diff --git a/package.json b/package.json
index 600e739..f6dab3f 100644
--- a/package.json
+++ b/package.json
@@ -47,6 +47,7 @@
     "next-themes": "^0.3.0",
     "react": "^18",
     "react-countup": "^6.5.3",
+    "react-day-picker": "8.10.1",
     "react-dom": "^18",
     "react-file-icon": "^1.5.0",
     "react-hook-form": "^7.53.0",
diff --git a/src/app/calendar/page.tsx b/src/app/calendar/page.tsx
new file mode 100644
index 0000000..88e8ca8
--- /dev/null
+++ b/src/app/calendar/page.tsx
@@ -0,0 +1,23 @@
+"use client";
+import React, { useState } from "react";
+import { DateTimePicker } from "@/components/ui/datetime-picker";
+import { Label } from "@/components/ui/label";
+
+const DatetimePickerHourCycle = () => {
+  const [date12, setDate12] = useState<Date | undefined>(undefined);
+  const [date24, setDate24] = useState<Date | undefined>(undefined);
+  return (
+    <div className="flex flex-col gap-3 lg:flex-row">
+      <div className="flex w-72 flex-col gap-2">
+        <Label>12 Hour</Label>
+        <DateTimePicker hourCycle={12} value={date12} onChange={setDate12} />
+      </div>
+      <div className="flex w-72 flex-col gap-2">
+        <Label>24 Hour</Label>
+        <DateTimePicker hourCycle={24} value={date24} onChange={setDate24} />
+      </div>
+    </div>
+  );
+};
+
+export default DatetimePickerHourCycle;
diff --git a/src/components/ui/calendar.tsx b/src/components/ui/calendar.tsx
new file mode 100644
index 0000000..61d2b45
--- /dev/null
+++ b/src/components/ui/calendar.tsx
@@ -0,0 +1,66 @@
+"use client"
+
+import * as React from "react"
+import { ChevronLeft, ChevronRight } from "lucide-react"
+import { DayPicker } from "react-day-picker"
+
+import { cn } from "@/lib/utils"
+import { buttonVariants } from "@/components/ui/button"
+
+export type CalendarProps = React.ComponentProps<typeof DayPicker>
+
+function Calendar({
+  className,
+  classNames,
+  showOutsideDays = true,
+  ...props
+}: CalendarProps) {
+  return (
+    <DayPicker
+      showOutsideDays={showOutsideDays}
+      className={cn("p-3", className)}
+      classNames={{
+        months: "flex flex-col sm:flex-row space-y-4 sm:space-x-4 sm:space-y-0",
+        month: "space-y-4",
+        caption: "flex justify-center pt-1 relative items-center",
+        caption_label: "text-sm font-medium",
+        nav: "space-x-1 flex items-center",
+        nav_button: cn(
+          buttonVariants({ variant: "outline" }),
+          "h-7 w-7 bg-transparent p-0 opacity-50 hover:opacity-100"
+        ),
+        nav_button_previous: "absolute left-1",
+        nav_button_next: "absolute right-1",
+        table: "w-full border-collapse space-y-1",
+        head_row: "flex",
+        head_cell:
+          "text-muted-foreground rounded-md w-9 font-normal text-[0.8rem]",
+        row: "flex w-full mt-2",
+        cell: "h-9 w-9 text-center text-sm p-0 relative [&:has([aria-selected].day-range-end)]:rounded-r-md [&:has([aria-selected].day-outside)]:bg-accent/50 [&:has([aria-selected])]:bg-accent first:[&:has([aria-selected])]:rounded-l-md last:[&:has([aria-selected])]:rounded-r-md focus-within:relative focus-within:z-20",
+        day: cn(
+          buttonVariants({ variant: "ghost" }),
+          "h-9 w-9 p-0 font-normal aria-selected:opacity-100"
+        ),
+        day_range_end: "day-range-end",
+        day_selected:
+          "bg-primary text-primary-foreground hover:bg-primary hover:text-primary-foreground focus:bg-primary focus:text-primary-foreground",
+        day_today: "bg-accent text-accent-foreground",
+        day_outside:
+          "day-outside text-muted-foreground aria-selected:bg-accent/50 aria-selected:text-muted-foreground",
+        day_disabled: "text-muted-foreground opacity-50",
+        day_range_middle:
+          "aria-selected:bg-accent aria-selected:text-accent-foreground",
+        day_hidden: "invisible",
+        ...classNames,
+      }}
+      components={{
+        IconLeft: ({ ...props }) => <ChevronLeft className="h-4 w-4" />,
+        IconRight: ({ ...props }) => <ChevronRight className="h-4 w-4" />,
+      }}
+      {...props}
+    />
+  )
+}
+Calendar.displayName = "Calendar"
+
+export { Calendar }
diff --git a/src/components/ui/datetime-picker.tsx b/src/components/ui/datetime-picker.tsx
new file mode 100644
index 0000000..e815969
--- /dev/null
+++ b/src/components/ui/datetime-picker.tsx
@@ -0,0 +1,742 @@
+import { Button, buttonVariants } from "@/components/ui/button";
+import type { CalendarProps } from "@/components/ui/calendar";
+import { Input } from "@/components/ui/input";
+import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
+import { cn } from "@/lib/utils";
+import { add, format } from "date-fns";
+import { type Locale, enUS } from "date-fns/locale";
+import { Calendar as CalendarIcon, ChevronLeft, ChevronRight } from "lucide-react";
+import { Clock } from "lucide-react";
+import * as React from "react";
+import { useImperativeHandle, useRef } from "react";
+
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
+import { DayPicker } from "react-day-picker";
+
+// ---------- utils start ----------
+/**
+ * regular expression to check for valid hour format (01-23)
+ */
+function isValidHour(value: string) {
+  return /^(0[0-9]|1[0-9]|2[0-3])$/.test(value);
+}
+
+/**
+ * regular expression to check for valid 12 hour format (01-12)
+ */
+function isValid12Hour(value: string) {
+  return /^(0[1-9]|1[0-2])$/.test(value);
+}
+
+/**
+ * regular expression to check for valid minute format (00-59)
+ */
+function isValidMinuteOrSecond(value: string) {
+  return /^[0-5][0-9]$/.test(value);
+}
+
+type GetValidNumberConfig = { max: number; min?: number; loop?: boolean };
+
+function getValidNumber(value: string, { max, min = 0, loop = false }: GetValidNumberConfig) {
+  let numericValue = parseInt(value, 10);
+
+  if (!Number.isNaN(numericValue)) {
+    if (!loop) {
+      if (numericValue > max) numericValue = max;
+      if (numericValue < min) numericValue = min;
+    } else {
+      if (numericValue > max) numericValue = min;
+      if (numericValue < min) numericValue = max;
+    }
+    return numericValue.toString().padStart(2, "0");
+  }
+
+  return "00";
+}
+
+function getValidHour(value: string) {
+  if (isValidHour(value)) return value;
+  return getValidNumber(value, { max: 23 });
+}
+
+function getValid12Hour(value: string) {
+  if (isValid12Hour(value)) return value;
+  return getValidNumber(value, { min: 1, max: 12 });
+}
+
+function getValidMinuteOrSecond(value: string) {
+  if (isValidMinuteOrSecond(value)) return value;
+  return getValidNumber(value, { max: 59 });
+}
+
+type GetValidArrowNumberConfig = {
+  min: number;
+  max: number;
+  step: number;
+};
+
+function getValidArrowNumber(value: string, { min, max, step }: GetValidArrowNumberConfig) {
+  let numericValue = parseInt(value, 10);
+  if (!Number.isNaN(numericValue)) {
+    numericValue += step;
+    return getValidNumber(String(numericValue), { min, max, loop: true });
+  }
+  return "00";
+}
+
+function getValidArrowHour(value: string, step: number) {
+  return getValidArrowNumber(value, { min: 0, max: 23, step });
+}
+
+function getValidArrow12Hour(value: string, step: number) {
+  return getValidArrowNumber(value, { min: 1, max: 12, step });
+}
+
+function getValidArrowMinuteOrSecond(value: string, step: number) {
+  return getValidArrowNumber(value, { min: 0, max: 59, step });
+}
+
+function setMinutes(date: Date, value: string) {
+  const minutes = getValidMinuteOrSecond(value);
+  date.setMinutes(parseInt(minutes, 10));
+  return date;
+}
+
+function setSeconds(date: Date, value: string) {
+  const seconds = getValidMinuteOrSecond(value);
+  date.setSeconds(parseInt(seconds, 10));
+  return date;
+}
+
+function setHours(date: Date, value: string) {
+  const hours = getValidHour(value);
+  date.setHours(parseInt(hours, 10));
+  return date;
+}
+
+function set12Hours(date: Date, value: string, period: Period) {
+  const hours = parseInt(getValid12Hour(value), 10);
+  const convertedHours = convert12HourTo24Hour(hours, period);
+  date.setHours(convertedHours);
+  return date;
+}
+
+type TimePickerType = "minutes" | "seconds" | "hours" | "12hours";
+type Period = "AM" | "PM";
+
+function setDateByType(date: Date, value: string, type: TimePickerType, period?: Period) {
+  switch (type) {
+    case "minutes":
+      return setMinutes(date, value);
+    case "seconds":
+      return setSeconds(date, value);
+    case "hours":
+      return setHours(date, value);
+    case "12hours": {
+      if (!period) return date;
+      return set12Hours(date, value, period);
+    }
+    default:
+      return date;
+  }
+}
+
+function getDateByType(date: Date | null, type: TimePickerType) {
+  if (!date) return "00";
+  switch (type) {
+    case "minutes":
+      return getValidMinuteOrSecond(String(date.getMinutes()));
+    case "seconds":
+      return getValidMinuteOrSecond(String(date.getSeconds()));
+    case "hours":
+      return getValidHour(String(date.getHours()));
+    case "12hours":
+      return getValid12Hour(String(display12HourValue(date.getHours())));
+    default:
+      return "00";
+  }
+}
+
+function getArrowByType(value: string, step: number, type: TimePickerType) {
+  switch (type) {
+    case "minutes":
+      return getValidArrowMinuteOrSecond(value, step);
+    case "seconds":
+      return getValidArrowMinuteOrSecond(value, step);
+    case "hours":
+      return getValidArrowHour(value, step);
+    case "12hours":
+      return getValidArrow12Hour(value, step);
+    default:
+      return "00";
+  }
+}
+
+/**
+ * handles value change of 12-hour input
+ * 12:00 PM is 12:00
+ * 12:00 AM is 00:00
+ */
+function convert12HourTo24Hour(hour: number, period: Period) {
+  if (period === "PM") {
+    if (hour <= 11) {
+      return hour + 12;
+    }
+    return hour;
+  }
+
+  if (period === "AM") {
+    if (hour === 12) return 0;
+    return hour;
+  }
+  return hour;
+}
+
+/**
+ * time is stored in the 24-hour form,
+ * but needs to be displayed to the user
+ * in its 12-hour representation
+ */
+function display12HourValue(hours: number) {
+  if (hours === 0 || hours === 12) return "12";
+  if (hours >= 22) return `${hours - 12}`;
+  if (hours % 12 > 9) return `${hours}`;
+  return `0${hours % 12}`;
+}
+
+function genMonths(locale: Pick<Locale, "options" | "localize" | "formatLong">) {
+  return Array.from({ length: 12 }, (_, i) => ({
+    value: i,
+    label: format(new Date(2021, i), "MMMM", { locale }),
+  }));
+}
+
+function genYears(yearRange = 50) {
+  const today = new Date();
+  return Array.from({ length: yearRange * 2 + 1 }, (_, i) => ({
+    value: today.getFullYear() - yearRange + i,
+    label: (today.getFullYear() - yearRange + i).toString(),
+  }));
+}
+
+// ---------- utils end ----------
+
+function Calendar({
+  className,
+  classNames,
+  showOutsideDays = true,
+  yearRange = 50,
+  ...props
+}: CalendarProps & { yearRange?: number }) {
+  const MONTHS = React.useMemo(() => {
+    let locale: Pick<Locale, "options" | "localize" | "formatLong"> = enUS;
+    const { options, localize, formatLong } = props.locale || {};
+    if (options && localize && formatLong) {
+      locale = {
+        options,
+        localize,
+        formatLong,
+      };
+    }
+    return genMonths(locale);
+  }, []);
+
+  const YEARS = React.useMemo(() => genYears(yearRange), []);
+
+  return (
+    <DayPicker
+      showOutsideDays={showOutsideDays}
+      className={cn("p-3", className)}
+      classNames={{
+        months: "flex flex-col sm:flex-row space-y-4  sm:space-y-0 justify-center",
+        month: "flex flex-col items-center space-y-4",
+        month_caption: "flex justify-center pt-1 relative items-center",
+        caption_label: "text-sm font-medium",
+        nav: "space-x-1 flex items-center ",
+        button_previous: cn(
+          buttonVariants({ variant: "outline" }),
+          "h-7 w-7 bg-transparent p-0 opacity-50 hover:opacity-100 absolute left-5 top-5"
+        ),
+        button_next: cn(
+          buttonVariants({ variant: "outline" }),
+          "h-7 w-7 bg-transparent p-0 opacity-50 hover:opacity-100 absolute right-5 top-5"
+        ),
+        month_grid: "w-full border-collapse space-y-1",
+        weekdays: cn("flex", props.showWeekNumber && "justify-end"),
+        weekday: "text-muted-foreground rounded-md w-9 font-normal text-[0.8rem]",
+        week: "flex w-full mt-2",
+        day: "h-9 w-9 text-center text-sm p-0 relative [&:has([aria-selected].day-range-end)]:rounded-r-md [&:has([aria-selected].day-outside)]:bg-accent/50 [&:has([aria-selected])]:bg-accent first:[&:has([aria-selected])]:rounded-l-md last:[&:has([aria-selected])]:rounded-r-md focus-within:relative focus-within:z-20 rounded-1",
+        day_button: cn(
+          buttonVariants({ variant: "ghost" }),
+          "h-9 w-9 p-0 font-normal aria-selected:opacity-100 rounded-l-md rounded-r-md"
+        ),
+        range_end: "day-range-end",
+        selected:
+          "bg-primary text-primary-foreground hover:bg-primary hover:text-primary-foreground focus:bg-primary focus:text-primary-foreground rounded-l-md rounded-r-md",
+        today: "bg-accent text-accent-foreground",
+        outside:
+          "day-outside text-muted-foreground opacity-50 aria-selected:bg-accent/50 aria-selected:text-muted-foreground aria-selected:opacity-30",
+        disabled: "text-muted-foreground opacity-50",
+        range_middle: "aria-selected:bg-accent aria-selected:text-accent-foreground",
+        hidden: "invisible",
+        ...classNames,
+      }}
+      components={{
+        Chevron: ({ ...props }) =>
+          props.orientation === "left" ? <ChevronLeft className="h-4 w-4" /> : <ChevronRight className="h-4 w-4" />,
+        MonthCaption: ({ calendarMonth }) => {
+          return (
+            <div className="inline-flex gap-2">
+              <Select
+                defaultValue={calendarMonth.date.getMonth().toString()}
+                onValueChange={(value) => {
+                  const newDate = new Date(calendarMonth.date);
+                  newDate.setMonth(Number.parseInt(value, 10));
+                  props.onMonthChange?.(newDate);
+                }}
+              >
+                <SelectTrigger className="w-fit gap-1 border-none p-0 focus:bg-accent focus:text-accent-foreground">
+                  <SelectValue />
+                </SelectTrigger>
+                <SelectContent>
+                  {MONTHS.map((month) => (
+                    <SelectItem key={month.value} value={month.value.toString()}>
+                      {month.label}
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+              <Select
+                defaultValue={calendarMonth.date.getFullYear().toString()}
+                onValueChange={(value) => {
+                  const newDate = new Date(calendarMonth.date);
+                  newDate.setFullYear(Number.parseInt(value, 10));
+                  props.onMonthChange?.(newDate);
+                }}
+              >
+                <SelectTrigger className="w-fit gap-1 border-none p-0 focus:bg-accent focus:text-accent-foreground">
+                  <SelectValue />
+                </SelectTrigger>
+                <SelectContent>
+                  {YEARS.map((year) => (
+                    <SelectItem key={year.value} value={year.value.toString()}>
+                      {year.label}
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+            </div>
+          );
+        },
+      }}
+      {...props}
+    />
+  );
+}
+Calendar.displayName = "Calendar";
+
+interface PeriodSelectorProps {
+  period: Period;
+  setPeriod?: (m: Period) => void;
+  date?: Date | null;
+  onDateChange?: (date: Date | undefined) => void;
+  onRightFocus?: () => void;
+  onLeftFocus?: () => void;
+}
+
+const TimePeriodSelect = React.forwardRef<HTMLButtonElement, PeriodSelectorProps>(
+  ({ period, setPeriod, date, onDateChange, onLeftFocus, onRightFocus }, ref) => {
+    const handleKeyDown = (e: React.KeyboardEvent<HTMLButtonElement>) => {
+      if (e.key === "ArrowRight") onRightFocus?.();
+      if (e.key === "ArrowLeft") onLeftFocus?.();
+    };
+
+    const handleValueChange = (value: Period) => {
+      setPeriod?.(value);
+
+      /**
+       * trigger an update whenever the user switches between AM and PM;
+       * otherwise user must manually change the hour each time
+       */
+      if (date) {
+        const tempDate = new Date(date);
+        const hours = display12HourValue(date.getHours());
+        onDateChange?.(setDateByType(tempDate, hours.toString(), "12hours", period === "AM" ? "PM" : "AM"));
+      }
+    };
+
+    return (
+      <div className="flex h-10 items-center">
+        <Select defaultValue={period} onValueChange={(value: Period) => handleValueChange(value)}>
+          <SelectTrigger
+            ref={ref}
+            className="w-[65px] focus:bg-accent focus:text-accent-foreground"
+            onKeyDown={handleKeyDown}
+          >
+            <SelectValue />
+          </SelectTrigger>
+          <SelectContent>
+            <SelectItem value="AM">AM</SelectItem>
+            <SelectItem value="PM">PM</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+    );
+  }
+);
+
+TimePeriodSelect.displayName = "TimePeriodSelect";
+
+interface TimePickerInputProps extends React.InputHTMLAttributes<HTMLInputElement> {
+  picker: TimePickerType;
+  date?: Date | null;
+  onDateChange?: (date: Date | undefined) => void;
+  period?: Period;
+  onRightFocus?: () => void;
+  onLeftFocus?: () => void;
+}
+
+const TimePickerInput = React.forwardRef<HTMLInputElement, TimePickerInputProps>(
+  (
+    {
+      className,
+      type = "tel",
+      value,
+      id,
+      name,
+      date = new Date(new Date().setHours(0, 0, 0, 0)),
+      onDateChange,
+      onChange,
+      onKeyDown,
+      picker,
+      period,
+      onLeftFocus,
+      onRightFocus,
+      ...props
+    },
+    ref
+  ) => {
+    const [flag, setFlag] = React.useState<boolean>(false);
+    const [prevIntKey, setPrevIntKey] = React.useState<string>("0");
+
+    /**
+     * allow the user to enter the second digit within 2 seconds
+     * otherwise start again with entering first digit
+     */
+    React.useEffect(() => {
+      if (flag) {
+        const timer = setTimeout(() => {
+          setFlag(false);
+        }, 2000);
+
+        return () => clearTimeout(timer);
+      }
+    }, [flag]);
+
+    const calculatedValue = React.useMemo(() => {
+      return getDateByType(date, picker);
+    }, [date, picker]);
+
+    const calculateNewValue = (key: string) => {
+      /*
+       * If picker is '12hours' and the first digit is 0, then the second digit is automatically set to 1.
+       * The second entered digit will break the condition and the value will be set to 10-12.
+       */
+      if (picker === "12hours") {
+        if (flag && calculatedValue.slice(1, 2) === "1" && prevIntKey === "0") return `0${key}`;
+      }
+
+      return !flag ? `0${key}` : calculatedValue.slice(1, 2) + key;
+    };
+
+    const handleKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
+      if (e.key === "Tab") return;
+      e.preventDefault();
+      if (e.key === "ArrowRight") onRightFocus?.();
+      if (e.key === "ArrowLeft") onLeftFocus?.();
+      if (["ArrowUp", "ArrowDown"].includes(e.key)) {
+        const step = e.key === "ArrowUp" ? 1 : -1;
+        const newValue = getArrowByType(calculatedValue, step, picker);
+        if (flag) setFlag(false);
+        const tempDate = date ? new Date(date) : new Date();
+        onDateChange?.(setDateByType(tempDate, newValue, picker, period));
+      }
+      if (e.key >= "0" && e.key <= "9") {
+        if (picker === "12hours") setPrevIntKey(e.key);
+
+        const newValue = calculateNewValue(e.key);
+        if (flag) onRightFocus?.();
+        setFlag((prev) => !prev);
+        const tempDate = date ? new Date(date) : new Date();
+        onDateChange?.(setDateByType(tempDate, newValue, picker, period));
+      }
+    };
+
+    return (
+      <Input
+        ref={ref}
+        id={id || picker}
+        name={name || picker}
+        className={cn(
+          "w-[48px] text-center font-mono text-base tabular-nums caret-transparent focus:bg-accent focus:text-accent-foreground [&::-webkit-inner-spin-button]:appearance-none",
+          className
+        )}
+        value={value || calculatedValue}
+        onChange={(e) => {
+          e.preventDefault();
+          onChange?.(e);
+        }}
+        type={type}
+        inputMode="decimal"
+        onKeyDown={(e) => {
+          onKeyDown?.(e);
+          handleKeyDown(e);
+        }}
+        {...props}
+      />
+    );
+  }
+);
+
+TimePickerInput.displayName = "TimePickerInput";
+
+interface TimePickerProps {
+  date?: Date | null;
+  onChange?: (date: Date | undefined) => void;
+  hourCycle?: 12 | 24;
+  /**
+   * Determines the smallest unit that is displayed in the datetime picker.
+   * Default is 'second'.
+   * */
+  granularity?: Granularity;
+}
+
+interface TimePickerRef {
+  minuteRef: HTMLInputElement | null;
+  hourRef: HTMLInputElement | null;
+  secondRef: HTMLInputElement | null;
+}
+
+const TimePicker = React.forwardRef<TimePickerRef, TimePickerProps>(
+  ({ date, onChange, hourCycle = 24, granularity = "second" }, ref) => {
+    const minuteRef = React.useRef<HTMLInputElement>(null);
+    const hourRef = React.useRef<HTMLInputElement>(null);
+    const secondRef = React.useRef<HTMLInputElement>(null);
+    const periodRef = React.useRef<HTMLButtonElement>(null);
+    const [period, setPeriod] = React.useState<Period>(date && date.getHours() >= 12 ? "PM" : "AM");
+
+    useImperativeHandle(
+      ref,
+      () => ({
+        minuteRef: minuteRef.current,
+        hourRef: hourRef.current,
+        secondRef: secondRef.current,
+        periodRef: periodRef.current,
+      }),
+      [minuteRef, hourRef, secondRef]
+    );
+
+    return (
+      <div className="flex items-center justify-center gap-2">
+        <label htmlFor="datetime-picker-hour-input" className="cursor-pointer">
+          <Clock className="mr-2 h-4 w-4" />
+        </label>
+        <TimePickerInput
+          picker={hourCycle === 24 ? "hours" : "12hours"}
+          date={date}
+          id="datetime-picker-hour-input"
+          onDateChange={onChange}
+          ref={hourRef}
+          period={period}
+          onRightFocus={() => minuteRef?.current?.focus()}
+        />
+        {(granularity === "minute" || granularity === "second") && (
+          <>
+            :
+            <TimePickerInput
+              picker="minutes"
+              date={date}
+              onDateChange={onChange}
+              ref={minuteRef}
+              onLeftFocus={() => hourRef?.current?.focus()}
+              onRightFocus={() => secondRef?.current?.focus()}
+            />
+          </>
+        )}
+        {granularity === "second" && (
+          <>
+            :
+            <TimePickerInput
+              picker="seconds"
+              date={date}
+              onDateChange={onChange}
+              ref={secondRef}
+              onLeftFocus={() => minuteRef?.current?.focus()}
+              onRightFocus={() => periodRef?.current?.focus()}
+            />
+          </>
+        )}
+        {hourCycle === 12 && (
+          <div className="grid gap-1 text-center">
+            <TimePeriodSelect
+              period={period}
+              setPeriod={setPeriod}
+              date={date}
+              onDateChange={(date) => {
+                onChange?.(date);
+                if (date && date?.getHours() >= 12) {
+                  setPeriod("PM");
+                } else {
+                  setPeriod("AM");
+                }
+              }}
+              ref={periodRef}
+              onLeftFocus={() => secondRef?.current?.focus()}
+            />
+          </div>
+        )}
+      </div>
+    );
+  }
+);
+TimePicker.displayName = "TimePicker";
+
+type Granularity = "day" | "hour" | "minute" | "second";
+
+type DateTimePickerProps = {
+  value?: Date;
+  onChange?: (date: Date | undefined) => void;
+  disabled?: boolean;
+  /** showing `AM/PM` or not. */
+  hourCycle?: 12 | 24;
+  placeholder?: string;
+  /**
+   * The year range will be: `This year + yearRange` and `this year - yearRange`.
+   * Default is 50.
+   * For example:
+   * This year is 2024, The year dropdown will be 1974 to 2024 which is generated by `2024 - 50 = 1974` and `2024 + 50 = 2074`.
+   * */
+  yearRange?: number;
+  /**
+   * The format is derived from the `date-fns` documentation.
+   * @reference https://date-fns.org/v3.6.0/docs/format
+   **/
+  displayFormat?: { hour24?: string; hour12?: string };
+  /**
+   * The granularity prop allows you to control the smallest unit that is displayed by DateTimePicker.
+   * By default, the value is `second` which shows all time inputs.
+   **/
+  granularity?: Granularity;
+  className?: string;
+} & Pick<CalendarProps, "locale" | "weekStartsOn" | "showWeekNumber" | "showOutsideDays">;
+
+type DateTimePickerRef = {
+  value?: Date;
+} & Omit<HTMLButtonElement, "value">;
+
+const DateTimePicker = React.forwardRef<Partial<DateTimePickerRef>, DateTimePickerProps>(
+  (
+    {
+      locale = enUS,
+      value,
+      onChange,
+      hourCycle = 24,
+      yearRange = 50,
+      disabled = false,
+      displayFormat,
+      granularity = "second",
+      placeholder = "Pick a date",
+      className,
+      ...props
+    },
+    ref
+  ) => {
+    const [month, setMonth] = React.useState<Date>(value ?? new Date());
+    const buttonRef = useRef<HTMLButtonElement>(null);
+    /**
+     * carry over the current time when a user clicks a new day
+     * instead of resetting to 00:00
+     */
+    const handleSelect = (newDay: Date | undefined) => {
+      if (!newDay) return;
+      if (!value) {
+        onChange?.(newDay);
+        setMonth(newDay);
+        return;
+      }
+      const diff = newDay.getTime() - value.getTime();
+      const diffInDays = diff / (1000 * 60 * 60 * 24);
+      const newDateFull = add(value, { days: Math.ceil(diffInDays) });
+      onChange?.(newDateFull);
+      setMonth(newDateFull);
+    };
+
+    useImperativeHandle(
+      ref,
+      () => ({
+        ...buttonRef.current,
+        value,
+      }),
+      [value]
+    );
+
+    const initHourFormat = {
+      hour24: displayFormat?.hour24 ?? `PPP HH:mm${!granularity || granularity === "second" ? ":ss" : ""}`,
+      hour12: displayFormat?.hour12 ?? `PP hh:mm${!granularity || granularity === "second" ? ":ss" : ""} b`,
+    };
+
+    let loc = enUS;
+    const { options, localize, formatLong } = locale;
+    if (options && localize && formatLong) {
+      loc = {
+        ...enUS,
+        options,
+        localize,
+        formatLong,
+      };
+    }
+
+    return (
+      <Popover>
+        <PopoverTrigger asChild disabled={disabled}>
+          <Button
+            variant="outline"
+            className={cn("w-full justify-start text-left font-normal", !value && "text-muted-foreground", className)}
+            ref={buttonRef}
+          >
+            <CalendarIcon className="mr-2 h-4 w-4" />
+            {value ? (
+              format(value, hourCycle === 24 ? initHourFormat.hour24 : initHourFormat.hour12, {
+                locale: loc,
+              })
+            ) : (
+              <span>{placeholder}</span>
+            )}
+          </Button>
+        </PopoverTrigger>
+        <PopoverContent className="w-auto p-0">
+          <Calendar
+            mode="single"
+            selected={value}
+            month={month}
+            onSelect={(d) => handleSelect(d)}
+            onMonthChange={handleSelect}
+            yearRange={yearRange}
+            locale={locale}
+            {...props}
+          />
+          {granularity !== "day" && (
+            <div className="border-t border-border p-3">
+              <TimePicker onChange={onChange} date={value} hourCycle={hourCycle} granularity={granularity} />
+            </div>
+          )}
+        </PopoverContent>
+      </Popover>
+    );
+  }
+);
+
+DateTimePicker.displayName = "DateTimePicker";
+
+export { DateTimePicker, TimePickerInput, TimePicker };
+export type { TimePickerType, DateTimePickerProps, DateTimePickerRef };