diff --git a/packages/ui-default/components/datepicker/datepicker.page.tsx b/packages/ui-default/components/datepicker/datepicker.page.tsx
index 783ff13f7..b9f509f16 100644
--- a/packages/ui-default/components/datepicker/datepicker.page.tsx
+++ b/packages/ui-default/components/datepicker/datepicker.page.tsx
@@ -2,26 +2,92 @@ import 'flatpickr/dist/flatpickr.min.css';
 
 import flatpickr from 'flatpickr';
 import $ from 'jquery';
-import Picker from 'pickadate/lib/picker';
 import { AutoloadPage } from 'vj/misc/Page';
-import TimePicker from './timepicker';
+
+function padTwo(n: number) {
+  return n < 10 ? `0${n}` : `${n}`;
+}
+
+function initTimePicker(input: HTMLInputElement) {
+  const $input = $(input);
+  const interval = 15;
+  const $wrapper = $('<div>').css({ position: 'relative', display: 'inline-block', width: '100%' });
+  $input.wrap($wrapper);
+
+  const $dropdown = $('<div>').css({
+    position: 'absolute',
+    top: $input.outerHeight(),
+    left: 0,
+    right: 0,
+    maxHeight: 0,
+    overflowY: 'auto',
+    background: 'var(--bg-color, #fff)',
+    border: '1px solid #ccc',
+    borderTop: 'none',
+    borderRadius: '0 0 4px 4px',
+    zIndex: 1000,
+    opacity: 0,
+    boxShadow: '0 2px 8px rgba(0,0,0,0.15)',
+    transition: 'max-height .2s ease, opacity .2s ease',
+    pointerEvents: 'none',
+  }).addClass('time-picker-dropdown');
+
+  for (let h = 0; h < 24; h++) {
+    for (let m = 0; m < 60; m += interval) {
+      const time = `${padTwo(h)}:${padTwo(m)}`;
+      const $item = $('<div>').text(time).css({
+        padding: '6px 12px',
+        cursor: 'pointer',
+      }).on('mousedown', (e) => {
+        e.preventDefault();
+        $input.val(time).trigger('change');
+        closeDropdown();
+      }).on('mouseenter', function () {
+        $(this).css('background', 'var(--highlight-color, #e8f0fe)');
+      }).on('mouseleave', function () {
+        $(this).css('background', '');
+      });
+      $dropdown.append($item);
+    }
+  }
+
+  let isOpen = false;
+
+  function openDropdown() {
+    if (isOpen) return;
+    isOpen = true;
+    $dropdown.css({ maxHeight: '200px', opacity: 1, pointerEvents: 'auto' });
+    const val = $input.val() as string;
+    if (val) {
+      $dropdown.children().each(function cb() {
+        if ($(this).text() !== val) return;
+        const el = this as HTMLElement;
+        el.parentElement!.scrollTop = el.offsetTop - el.parentElement!.offsetTop - 80;
+      });
+    }
+  }
+
+  function closeDropdown() {
+    if (!isOpen) return;
+    isOpen = false;
+    $dropdown.css({ maxHeight: 0, opacity: 0, pointerEvents: 'none' });
+  }
+
+  $input.after($dropdown);
+  $input.on('focus', openDropdown);
+  // Only close when the element actually loses focus within the page,
+  // not when the whole window loses focus (alt-tab)
+  $input.on('blur', () => {
+    if (document.hasFocus()) closeDropdown();
+  });
+}
 
 const datepickerPage = new AutoloadPage('datepickerPage', async () => {
   $('[data-pick-date]').each(function () {
     flatpickr(this, { allowInput: true });
   });
   $('[data-pick-time]').each(function () {
-    const $this = $(this);
-    if (!$this.data('pickatime')) {
-      // eslint-disable-next-line no-new
-      new Picker(this, 'pickatime', TimePicker, {
-        format: 'H:i',
-        editable: true,
-        interval: 15,
-        clear: false,
-        onSet() { $this.trigger('change'); },
-      });
-    }
+    initTimePicker(this as HTMLInputElement);
   });
 });
 
diff --git a/packages/ui-default/components/datepicker/datepicker.styl b/packages/ui-default/components/datepicker/datepicker.styl
deleted file mode 100644
index 68e155e70..000000000
--- a/packages/ui-default/components/datepicker/datepicker.styl
+++ /dev/null
@@ -1,53 +0,0 @@
-.picker__holder
-  margin-top: -1rem
-  border-radius: 0
-  transform: scale(0.9) translateZ(0)
-  transform-origin: 0 0
-  outline: 0
-  font-size: rem($font-size-secondary)
-  transition: transform .1s ease-in-out,
-              opacity .1s ease-in-out,
-              max-height 0s .1s,
-              border-width 0s .1s
-
-.picker--opened .picker__holder
-  transform: scale(1) translateZ(0)
-  transition: transform .1s ease-in-out,
-              opacity .1s ease-in-out,
-              max-height 0s,
-              border-width 0s
-
-.picker__list
-  padding: 0
-
-.picker__list-item
-  border: 0
-
-.picker__list-item:hover
-  background: $datapicker-list-item-bg-color-hover
-
-.picker__list-item--selected, .picker__list-item--selected:hover, .picker--focused .picker__list-item--selected
-  background: $primary-color
-
-.picker__day--infocus:hover, .picker__day--outfocus:hover
-  background: $datapicker-list-item-bg-color-hover
-
-.picker__day--highlighted
-  border-color: transparent
-
-.picker__day--highlighted:hover, .picker--focused .picker__day--highlighted
-  background: transparent
-
-.picker__day--selected, .picker__day--selected:hover, .picker--focused .picker__day--selected
-  background: $primary-color
-
-.picker__button--today:hover, .picker__button--clear:hover, .picker__button--close:hover
-  background: $datapicker-list-item-bg-color-hover
-  border-color: $datapicker-list-item-bg-color-hover
-
-.picker__button--today:focus, .picker__button--clear:focus, .picker__button--close:focus
-  background: $datapicker-list-item-bg-color-hover
-  border-color: $datapicker-list-item-bg-color-hover
-
-.picker__nav--prev:hover, .picker__nav--next:hover
-  background: $datapicker-list-item-bg-color-hover
diff --git a/packages/ui-default/components/datepicker/timepicker.ts b/packages/ui-default/components/datepicker/timepicker.ts
deleted file mode 100644
index c891dffc2..000000000
--- a/packages/ui-default/components/datepicker/timepicker.ts
+++ /dev/null
@@ -1,307 +0,0 @@
-/* eslint-disable */
-import Picker from 'pickadate/lib/picker';
-
-const HOURS_IN_DAY = 24;
-const MINUTES_IN_HOUR = 60;
-const MINUTES_IN_DAY = HOURS_IN_DAY * MINUTES_IN_HOUR;
-const { _ } = Picker;
-export default class TimePicker {
-  queue = {
-    interval: 'i',
-    min: 'measure create',
-    max: 'measure create',
-    now: 'now create',
-    select: 'parse create',
-    highlight: 'parse create',
-    view: 'parse create',
-  };
-
-  item = {
-    clear: null,
-    interval: 15,
-    disable: [],
-    enable: 1,
-    select: undefined,
-    highlight: undefined,
-    min: undefined,
-    max: undefined,
-    view: undefined,
-  };
-
-  key = {
-    40: 1, // Down
-    38: -1, // Up
-    39: 1, // Right
-    37: -1, // Left
-    go(timeChange) {
-      this.set(
-        'highlight',
-        this.item.highlight.pick + timeChange * this.item.interval,
-        { interval: timeChange * this.item.interval },
-      );
-      this.render();
-    },
-  };
-
-  $node: any;
-
-  constructor(picker, public settings) {
-    const clock = this;
-    const elementValue = picker.$node[0].value;
-    const elementDataValue = picker.$node.data('value');
-    const valueString = elementDataValue || elementValue;
-    const formatString = elementDataValue ? settings.formatSubmit : settings.format;
-    clock.$node = picker.$node;
-    clock
-      .set('min', settings.min)
-      .set('max', settings.max)
-      .set('select', valueString || '00:00', {
-        format: formatString,
-      });
-
-    picker
-      .on('render', () => {
-        const $pickerHolder = picker.$root.children();
-        const $viewset = $pickerHolder.find(`.${settings.klass.viewset}`);
-        const vendors = function (prop) {
-          return ['webkit', 'moz', 'ms', 'o', ''].map((vendor) => (vendor ? `-${vendor}-` : '') + prop);
-        };
-        const animations = function ($el, state) {
-          vendors('transform').map((prop) => {
-            $el.css(prop, state);
-          });
-          vendors('transition').map((prop) => {
-            $el.css(prop, state);
-          });
-        };
-        if ($viewset.length) {
-          animations($pickerHolder, 'none');
-          $pickerHolder[0].scrollTop = ~~$viewset.position().top - ($viewset[0].clientHeight * 2);
-          animations($pickerHolder, '');
-        }
-      }, 1)
-      .on('open', () => {
-        picker.$root.find('button').attr('disabled', false);
-      }, 1)
-      .on('close', () => {
-        picker.$root.find('button').attr('disabled', true);
-      }, 1);
-  }
-
-  set(type, value?, options?) {
-    const clock = this;
-    const clockItem = clock.item;
-
-    if (value === null) {
-      if (type == 'clear') type = 'select';
-      clockItem[type] = value;
-      return clock;
-    }
-
-    // Otherwise go through the queue of methods, and invoke the functions.
-    // Update this as the time unit, and set the final value as this item.
-    // * In the case of `enable`, keep the queue but set `disable` instead.
-    clockItem[type] = clock.queue[type].split(' ').map((method) => {
-      value = clock[method](type, value, options);
-      return value;
-    }).pop();
-
-    if (type == 'select') {
-      clock.set('highlight', clockItem.select, options);
-    } else if (type == 'highlight') {
-      clock.set('view', clockItem.highlight, options);
-    } else if (type == 'min') {
-      clock.set('max', clockItem.max, options);
-    }
-    return clock;
-  }
-
-  get(type) {
-    return this.item[type];
-  }
-
-  formats = {
-    H(string, timeObject) {
-      return string ? _.digits(string) : `${timeObject.hour % 24}`;
-    },
-    i(string, timeObject) {
-      return string ? 2 : _.lead(timeObject.mins);
-    },
-
-    // Create an array by splitting the formatting string passed.
-    toArray(formatString) { return formatString.split(/(h{1,2}|H{1,2}|i|a|A|!.)/g); },
-    // Format an object into a string using the formatting options.
-    toString(formatString, itemObject) {
-      const clock = this;
-      return clock.formats.toArray(formatString).map((label) => _.trigger(clock.formats[label], clock, [0, itemObject]) || label.replace(/^!/, '')).join('');
-    },
-  };
-
-  create(type, value?, options?) {
-    const clock = this;
-    value = value === undefined ? type : value;
-    if (_.isDate(value)) {
-      value = [value.getHours(), value.getMinutes()];
-    }
-    if (value && typeof value === 'object' && _.isInteger(value.pick)) {
-      value = value.pick;
-    } else if (Array.isArray(value)) {
-      value = +value[0] * MINUTES_IN_HOUR + (+value[1]);
-    }
-    if (type == 'max' && value < clock.item.min.pick) {
-      value += MINUTES_IN_DAY;
-    }
-    if (type != 'min' && type != 'max' && (value - clock.item.min.pick) % clock.item.interval !== 0) {
-      value += clock.item.interval;
-    }
-    value = clock.normalize(type, value, options);
-    return {
-      hour: ~~(HOURS_IN_DAY + value / MINUTES_IN_HOUR) % HOURS_IN_DAY,
-      mins: (MINUTES_IN_HOUR + value % MINUTES_IN_HOUR) % MINUTES_IN_HOUR,
-      time: (MINUTES_IN_DAY + value) % MINUTES_IN_DAY,
-      pick: value % MINUTES_IN_DAY,
-    };
-  }
-
-  normalize(type, value, _options) {
-    const { interval } = this.item;
-    const minTime = this.item.min && this.item.min.pick || 0;
-    value -= type == 'min' ? 0 : (value - minTime) % interval;
-    return value;
-  }
-
-  measure(type, value, options) {
-    value ||= type == 'min' ? [0, 0] : [HOURS_IN_DAY - 1, MINUTES_IN_HOUR - 1];
-    if (typeof value === 'string') {
-      value = this.parse(type, value);
-    } else if (value && typeof value === 'object' && _.isInteger(value.pick)) {
-      value = this.normalize(type, value.pick, options);
-    }
-    return value;
-  }
-
-  scope = function (timeObject) {
-    const minLimit = this.item.min.pick;
-    const maxLimit = this.item.max.pick;
-    return this.create(timeObject.pick > maxLimit ? maxLimit : timeObject.pick < minLimit ? minLimit : timeObject);
-  }; // TimePicker.prototype.scope
-
-  parse(type, value, options?) {
-    let hour; let minutes; let item; let parseValue;
-    const clock = this;
-    const parsingObject = {};
-    if (!value || typeof value !== 'string') return value;
-
-    if (!(options && options.format)) {
-      options = options || {};
-      options.format = clock.settings.format;
-    }
-
-    clock.formats.toArray(options.format).map((label) => {
-      let substring;
-      const formattingLabel = clock.formats[label];
-      const formatLength = formattingLabel
-        ? _.trigger(formattingLabel, clock, [value, parsingObject])
-        : label.replace(/^!/, '').length;
-      if (formattingLabel) {
-        substring = value.substr(0, formatLength);
-        parsingObject[label] = substring.match(/^\d+$/) ? +substring : substring;
-      }
-      value = value.substr(formatLength);
-    });
-
-    // Grab the hour and minutes from the parsing object.
-    for (item in parsingObject) {
-      parseValue = parsingObject[item];
-      if (_.isInteger(parseValue)) {
-        if (item.match(/^(h|hh)$/i)) hour = parseValue;
-        else if (item == 'i') minutes = parseValue;
-      }
-    }
-
-    // Calculate it in minutes and return.
-    return hour * MINUTES_IN_HOUR + minutes;
-  }
-
-  nodes(isOpen) {
-    const clock = this;
-    const { settings } = clock;
-    const selectedObject = clock.item.select;
-    const highlightedObject = clock.item.highlight;
-    const viewsetObject = clock.item.view;
-
-    return _.node(
-      'ul',
-      _.group({
-        min: clock.item.min.pick,
-        max: clock.item.max.pick,
-        i: clock.item.interval,
-        node: 'li',
-        item(loopedTime) {
-          loopedTime = clock.create(loopedTime);
-          const timeMinutes = loopedTime.pick;
-          const isSelected = selectedObject && selectedObject.pick == timeMinutes;
-          const isHighlighted = highlightedObject && highlightedObject.pick == timeMinutes;
-          const formattedTime = _.trigger(clock.formats.toString, clock, [settings.format, loopedTime]);
-          return [
-            _.trigger(clock.formats.toString, clock, [_.trigger(settings.formatLabel, clock, [loopedTime]) || settings.format, loopedTime]),
-            (function (klasses) {
-              if (isSelected) klasses.push(settings.klass.selected);
-
-              if (isHighlighted) klasses.push(settings.klass.highlighted);
-
-              if (viewsetObject && viewsetObject.pick == timeMinutes) {
-                klasses.push(settings.klass.viewset);
-              }
-
-              return klasses.join(' ');
-            }([settings.klass.listItem])),
-            `data-pick=${loopedTime.pick} ${_.ariaAttr({
-              role: 'option',
-              label: formattedTime,
-              selected: isSelected && clock.$node.val() === formattedTime ? true : null,
-              activedescendant: isHighlighted ? true : null,
-              disabled: null,
-            })}`,
-          ];
-        },
-      })
-      + _.node(
-        'li',
-        _.node(
-          'button',
-          settings.clear,
-          settings.klass.buttonClear,
-          `type=button data-clear=1${isOpen ? '' : ' disabled'} ${_.ariaAttr({ controls: clock.$node[0].id })}`,
-        ),
-        '',
-        _.ariaAttr({ role: 'presentation' }),
-      ),
-      settings.klass.list,
-      _.ariaAttr({ role: 'listbox', controls: clock.$node[0].id }),
-    );
-  }
-
-  static defaults = (function (prefix) {
-    return {
-      clear: 'Clear',
-      format: 'h:i A',
-      interval: 30,
-      closeOnSelect: true,
-      closeOnClear: true,
-      updateInput: true,
-      klass: {
-        picker: `${prefix} ${prefix}--time`,
-        holder: `${prefix}__holder`,
-        list: `${prefix}__list`,
-        listItem: `${prefix}__list-item`,
-        disabled: `${prefix}__list-item--disabled`,
-        selected: `${prefix}__list-item--selected`,
-        highlighted: `${prefix}__list-item--highlighted`,
-        viewset: `${prefix}__list-item--viewset`,
-        now: `${prefix}__list-item--now`,
-        buttonClear: `${prefix}__button--clear`,
-      },
-    };
-  }(Picker.klasses().picker));
-}
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 954d87213..ae3bc477d 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -34,7 +34,6 @@
     "@types/katex": "^0.16.8",
     "@types/markdown-it": "^14.1.2",
     "@types/nunjucks": "^3.2.6",
-    "@types/pickadate": "^3.5.35",
     "@types/qrcode": "^1.5.6",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
@@ -81,7 +80,6 @@
     "normalize.css": "^8.0.1",
     "nprogress": "^0.2.0",
     "p-queue": "^9.1.2",
-    "pickadate": "patch:pickadate@npm%3A3.6.4#~/.yarn/patches/pickadate-npm-3.6.4-5795acb19d.patch",
     "postcss-loader": "7.3.4",
     "postcss-preset-mantine": "^1.18.0",
     "prism-themes": "^1.9.0",
diff --git a/packages/ui-default/theme/default.js b/packages/ui-default/theme/default.js
index 6e5c17597..417db58c9 100644
--- a/packages/ui-default/theme/default.js
+++ b/packages/ui-default/theme/default.js
@@ -1,8 +1,5 @@
 import 'normalize.css/normalize.css';
 import 'allotment/dist/style.css';
-import 'pickadate/lib/themes/classic.css';
-import 'pickadate/lib/themes/classic.date.css';
-import 'pickadate/lib/themes/classic.time.css';
 import 'katex/dist/katex.min.css';
 import '@mantine/core/styles.css';
 import '@mantine/notifications/styles.css';
@@ -26,7 +23,6 @@ import 'vj/misc/structure.styl';
 import 'vj/misc/section.styl';
 import 'vj/misc/nothing.styl';
 import 'vj/components/editor/cmeditor.styl';
-import 'vj/components/datepicker/datepicker.styl';
 import './dark.styl';
 import './bp6-compat.css';