diff --git a/Gemfile b/Gemfile
index d32c267f9..4c28d3619 100644
--- a/Gemfile
+++ b/Gemfile
@@ -36,7 +36,6 @@ gem 'omniauth'
 gem 'omniauth-github'
 gem 'omniauth-rails_csrf_protection'
 gem 'pg'
-gem 'pickadate-rails'
 gem 'premailer-rails'
 
 gem 'pundit'
diff --git a/Gemfile.lock b/Gemfile.lock
index 3624f8f5e..535c1d98c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -352,8 +352,6 @@ GEM
     pg (1.6.3-arm64-darwin)
     pg (1.6.3-x86_64-darwin)
     pg (1.6.3-x86_64-linux)
-    pickadate-rails (3.5.6.1)
-      railties (>= 3.1.0)
     playwright-ruby-client (1.61.0)
       base64
       concurrent-ruby (>= 1.1.6)
@@ -666,7 +664,6 @@ DEPENDENCIES
   pagy (~> 43.6)
   parallel_tests
   pg
-  pickadate-rails
   premailer-rails
   pry-byebug
   pry-rails
@@ -847,7 +844,6 @@ CHECKSUMS
   pg (1.6.3-arm64-darwin) sha256=7240330b572e6355d7c75a7de535edb5dfcbd6295d9c7777df4d9dddfb8c0e5f
   pg (1.6.3-x86_64-darwin) sha256=ee2e04a17c0627225054ffeb43e31a95be9d7e93abda2737ea3ce4a62f2729d6
   pg (1.6.3-x86_64-linux) sha256=5d9e188c8f7a0295d162b7b88a768d8452a899977d44f3274d1946d67920ae8d
-  pickadate-rails (3.5.6.1) sha256=b10a91fe2c2c2695d15593fc4927068aba779cdea30537350a75da98f45f169d
   playwright-ruby-client (1.61.0) sha256=1f5c5f0307a2f6bd70b4fa797020a30eef5680caf8d5bd9ccc8d3937f6666e08
   popper_js (2.11.8) sha256=f4b0be717fc0d50bdb3dbbc55788525a9e0e8f640b76c9971fc34ee609eadbd2
   pp (0.6.4) sha256=dfcb0fce700c41456265922884f9fe195d7fbb0674a3578e6c0f69588e82b570
diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index 5cc0d43c8..964776723 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -16,10 +16,7 @@
 //= require rails-ujs
 //= require activestorage
 //= require chosen.jquery
-//= require feedback-rating
-//= require pickadate/picker
-//= require pickadate/picker.date
-//= require pickadate/picker.time
+//= require 'jsimple-star-rating.min.js'
 //= require subscriptions-toggle
 //= require add-all-chapters
 //= require invitations
@@ -31,16 +28,6 @@
 $(function() {
   $("body").removeClass("no-js");
 
-  $('#event_local_date, #meeting_local_date, #workshop_local_date, #workshop_rsvp_open_local_date, #workshop_rsvp_close_local_date').pickadate({
-    format: 'dd/mm/yyyy'
-  });
-  $('#announcement_expires_at, #ban_expires_at').pickadate();
-  $(
-    "#meeting_local_time, #meeting_local_end_time, #event_local_time, #event_local_end_time, #workshop_local_time, #workshop_local_end_time, #workshop_rsvp_open_local_time, #workshop_rsvp_close_local_time"
-  ).pickatime({
-    format: "HH:i",
-  });
-
   // Chosen for all other selects (exclude TomSelect fields)
   // Chosen hides inputs and selects, which becomes problematic when they are
   // required: browser validation doesn't get shown to the user.
diff --git a/app/assets/stylesheets/application.scss b/app/assets/stylesheets/application.scss
index 54e9f854d..71cbed7d0 100644
--- a/app/assets/stylesheets/application.scss
+++ b/app/assets/stylesheets/application.scss
@@ -11,9 +11,6 @@
  *= require_self
  *= require font_awesome5
  *= require main
- *= require pickadate/classic
- *= require pickadate/classic.date
- *= require pickadate/classic.time
  *= require chosen
  */
 
diff --git a/app/views/admin/announcements/edit.html.haml b/app/views/admin/announcements/edit.html.haml
index 823b0b485..097242a38 100644
--- a/app/views/admin/announcements/edit.html.haml
+++ b/app/views/admin/announcements/edit.html.haml
@@ -9,6 +9,6 @@
         = f.association :groups, label_method: :to_s, label: 'Select groups'
         = f.input :message, input_html: { rows: 3 },
           hint: raw(t('admin.shared.markdown_hint', link: link_to(t('admin.shared.markdown'), 'https://commonmark.org/help/')))
-        = f.input :expires_at, as: :string
+        = f.input :expires_at, as: :string, input_html: { value: @announcement.expires_at.strftime('%Y-%m-%d'), type: :date }
         .text-right
           = f.button :button, :update, class: 'btn btn-primary'
diff --git a/app/views/admin/announcements/new.html.haml b/app/views/admin/announcements/new.html.haml
index a82cb3c3f..e14cbed8f 100644
--- a/app/views/admin/announcements/new.html.haml
+++ b/app/views/admin/announcements/new.html.haml
@@ -10,6 +10,6 @@
         = f.input :all_groups, as: :boolean, checked_value: true, unchecked_value: false, label: 'Send to all groups'
         = f.input :message, input_html: { rows: 3 },
           hint: raw(t('admin.shared.markdown_hint', link: link_to(t('admin.shared.markdown'), 'https://commonmark.org/help/')))
-        = f.input :expires_at, as: :string
+        = f.input :expires_at, as: :string, input_html: { type: :date }
         .text-right
           = f.button :button, :create, class: 'btn btn-primary'
diff --git a/app/views/admin/bans/new.html.haml b/app/views/admin/bans/new.html.haml
index 8368200cc..1d7c7eccd 100644
--- a/app/views/admin/bans/new.html.haml
+++ b/app/views/admin/bans/new.html.haml
@@ -12,7 +12,7 @@
         = f.input :reason, as: :select, collection: [ 'Violated attendance policy', 'Violated code of conduct', 'Violated attendance eligibility', 'Offensive behavior' ]
         = f.input :note, input_html: { rows: 3 }
         = f.input :explanation, input_html: { rows: 3 }
-        = f.input :expires_at, as: :string, required: true, label: 'Date', input_html: { data: { value: Time.zone.now+1.month } }
+        = f.input :expires_at, as: :string, required: true, label: 'Date', input_html: { value: (Time.zone.now + 1.month).strftime('%Y-%m-%d'), type: :date }
         = f.input :permanent, as: :boolean
         .text-right
           = f.button :button, t('.create'), class: 'btn btn-primary'
diff --git a/app/views/admin/events/_form.html.haml b/app/views/admin/events/_form.html.haml
index 8f1dcc77a..231089153 100644
--- a/app/views/admin/events/_form.html.haml
+++ b/app/views/admin/events/_form.html.haml
@@ -11,11 +11,11 @@
     .col-12.col-md-6
       = f.input :slug, placeholder: 'for URI, e.g. 24-pull-requests'
     .col-12
-      = f.input :local_date, label: 'Date', as: :string, required: true, input_html: { data: { value: @event.date_and_time.try(:strftime, '%d/%m/%Y') } }
+      = f.input :local_date, label: 'Date', required: true, input_html: { value: @event.date_and_time.try(:strftime, '%Y-%m-%d'), type: :date }
     .col-12.col-md-6
-      = f.input :local_time, label: 'Starts at', as: :string, required: true, input_html: { data: { value: @event.time.try(:strftime, '%H:%M') } }
+      = f.input :local_time, label: 'Starts at', required: true, input_html: { value: @event.time.try(:strftime, '%H:%M'), type: :time }
     .col-12.col-md-6
-      = f.input :local_end_time, label: 'Ends at', as: :string, required: true, input_html: { data: { value: @event.ends_at.try(:strftime, '%H:%M') } }
+      = f.input :local_end_time, label: 'Ends at', required: true, input_html: { value: @event.ends_at.try(:strftime, '%H:%M'), type: :time }
     .col-12
       .mb-3
         %label.form-label{ for: "event_timezone" } Time zone
diff --git a/app/views/admin/meetings/_form.html.haml b/app/views/admin/meetings/_form.html.haml
index 9c7c97ca3..9b37d301f 100644
--- a/app/views/admin/meetings/_form.html.haml
+++ b/app/views/admin/meetings/_form.html.haml
@@ -10,11 +10,11 @@
     .col-12.col-md-6
       = f.input :slug, required: true
     .col-12.col-md-6
-      = f.input :local_date, as: :string, required: true, input_html: { data: { value: @meeting.date_and_time.try(:strftime, '%d/%m/%Y') } }
+      = f.input :local_date, required: true, input_html: { value: @meeting.date_and_time.try(:strftime, '%Y-%m-%d'), type: :date }
     .col-12.col-md-6
-      = f.input :local_time, label: 'Starts at', as: :string, required: true, input_html: { data: { value: @meeting.time.try(:strftime, '%H:%M') } }
+      = f.input :local_time, label: 'Starts at', required: true, input_html: { value: @meeting.time.try(:strftime, '%H:%M'), type: :time }
     .col-12.col-md-6
-      = f.input :local_end_time, label: 'Ends at', as: :string, required: true, input_html: { data: { value: @meeting.ends_at.try(:strftime, '%H:%M') } }
+      = f.input :local_end_time, label: 'Ends at', required: true, input_html: { value: @meeting.ends_at.try(:strftime, '%H:%M'), type: :time }
     .col-12
       = f.input :description, placeholder: 'Supports HTML', as: :text, input_html: { rows: 5 }
     .col-12
diff --git a/app/views/admin/workshops/_shared_form.html.haml b/app/views/admin/workshops/_shared_form.html.haml
index 042c431b3..20fafb5f3 100644
--- a/app/views/admin/workshops/_shared_form.html.haml
+++ b/app/views/admin/workshops/_shared_form.html.haml
@@ -5,11 +5,11 @@
     .col-12
       = f.association :chapter, as: :select, collection: Chapter.available_to_user(current_user)
   .col-12
-    = f.input :local_date, label: 'Date', as: :string, required: true, input_html: { data: { value: @workshop.date_and_time.try(:strftime, '%d/%m/%Y') } }
+    = f.input :local_date, label: 'Date', required: true, input_html: { value: @workshop.date_and_time.try(:strftime, '%Y-%m-%d'), type: :date }
   .col-12.col-md-6
-    = f.input :local_time, label: 'Begins at', as: :string, required: true, input_html: { data: { value: @workshop.time.try(:strftime, '%H:%M') } }
+    = f.input :local_time, label: 'Begins at', required: true, input_html: { value: @workshop.time.try(:strftime, '%H:%M'), type: :time }
   .col-12.col-md-6
-    = f.input :local_end_time, label: 'Ends at', as: :string, required: true, input_html: { data: { value: @workshop.ends_at.try(:strftime, '%H:%M') } }
+    = f.input :local_end_time, label: 'Ends at', required: true, input_html: { value: @workshop.ends_at.try(:strftime, '%H:%M'), type: :time }
   .col-12#host
     = f.input :host, as: :select, collection: Sponsor.all, include_blank: true, selected: (@workshop.host.id rescue '')
   .col-12
@@ -27,11 +27,11 @@
         %p.small.text-muted= t('admin.workshop.form.rsvp_details')
         .row
           .col-12.col-md-6
-            = f.input :rsvp_open_local_date, label: 'Open date', as: :string, input_html: { data: { value: @workshop.rsvp_opens_at.try(:strftime, '%d/%m/%Y') } }
+            = f.input :rsvp_open_local_date, label: 'Open date', input_html: { value: @workshop.rsvp_opens_at.try(:strftime, '%Y-%m-%d'), type: :date }
           .col-12.col-md-6
-            = f.input :rsvp_open_local_time, label: 'Open time', as: :string, input_html: { data: { value: @workshop.rsvp_opens_at.try(:time).try(:strftime, '%H:%M') } }
+            = f.input :rsvp_open_local_time, label: 'Open time', input_html: { value: @workshop.rsvp_opens_at.try(:time).try(:strftime, '%H:%M'), type: :time }
         .row
           .col-12.col-md-6
-            = f.input :rsvp_close_local_date, label: 'Close date', as: :string, input_html: { data: { value: @workshop.rsvp_closes_at.try(:strftime, '%d/%m/%Y') } }
+            = f.input :rsvp_close_local_date, label: 'Close date', input_html: { value: @workshop.rsvp_closes_at.try(:strftime, '%Y-%m-%d'), type: :date }
           .col-12.col-md-6
-            = f.input :rsvp_close_local_time, label: 'Close time', as: :string, input_html: { data: { value: @workshop.rsvp_closes_at.try(:time).try(:strftime, '%H:%M') } }
+            = f.input :rsvp_close_local_time, label: 'Close time', input_html: { value: @workshop.rsvp_closes_at.try(:time).try(:strftime, '%H:%M'), type: :time }
diff --git a/spec/controllers/admin/announcements_controller_spec.rb b/spec/controllers/admin/announcements_controller_spec.rb
new file mode 100644
index 000000000..7bff3f514
--- /dev/null
+++ b/spec/controllers/admin/announcements_controller_spec.rb
@@ -0,0 +1,28 @@
+RSpec.describe Admin::AnnouncementsController do
+  let(:member) { Fabricate(:member) }
+  let(:announcement) { Fabricate(:announcement) }
+
+  before do
+    login_as_admin(member)
+  end
+
+  describe 'GET #new' do
+    render_views
+
+    it 'renders with a native date input' do
+      get :new
+
+      expect(response.body).to include('type="date"')
+    end
+  end
+
+  describe 'GET #edit' do
+    render_views
+
+    it 'pre-fills the date value in ISO format' do
+      get :edit, params: { id: announcement.id }
+
+      expect(response.body).to include("value=\"#{announcement.expires_at.strftime('%Y-%m-%d')}\"")
+    end
+  end
+end
diff --git a/spec/controllers/admin/bans_controller_spec.rb b/spec/controllers/admin/bans_controller_spec.rb
new file mode 100644
index 000000000..530285a39
--- /dev/null
+++ b/spec/controllers/admin/bans_controller_spec.rb
@@ -0,0 +1,25 @@
+RSpec.describe Admin::BansController do
+  let(:member) { Fabricate(:member) }
+  let(:admin) { Fabricate(:member) }
+
+  before do
+    login_as_admin(admin)
+  end
+
+  describe 'GET #new' do
+    render_views
+
+    it 'renders with a native date input' do
+      get :new, params: { member_id: member.id }
+
+      expect(response.body).to include('type="date"')
+    end
+
+    it 'defaults to approximately one month from today' do
+      get :new, params: { member_id: member.id }
+
+      expected = (Time.zone.now + 1.month).strftime('%Y-%m-%d')
+      expect(response.body).to include("value=\"#{expected}\"")
+    end
+  end
+end
diff --git a/spec/controllers/admin/events_controller_spec.rb b/spec/controllers/admin/events_controller_spec.rb
index 5f386b5f6..5a1825f82 100644
--- a/spec/controllers/admin/events_controller_spec.rb
+++ b/spec/controllers/admin/events_controller_spec.rb
@@ -42,4 +42,26 @@
       expect(flash[:notice]).to eq('You can\'t be here')
     end
   end
+
+  describe 'GET #new' do
+    render_views
+
+    it 'renders with native date and time inputs' do
+      get :new
+
+      expect(response.body).to include('type="date"')
+      expect(response.body).to include('type="time"')
+    end
+  end
+
+  describe 'GET #edit' do
+    render_views
+
+    it 'pre-fills date and time values in ISO format' do
+      get :edit, params: { id: event.slug }
+
+      expect(response.body).to include("value=\"#{event.date_and_time.strftime('%Y-%m-%d')}\"")
+      expect(response.body).to include("value=\"#{event.time.strftime('%H:%M')}\"")
+    end
+  end
 end
diff --git a/spec/controllers/admin/meetings_controller_spec.rb b/spec/controllers/admin/meetings_controller_spec.rb
new file mode 100644
index 000000000..2969eba4f
--- /dev/null
+++ b/spec/controllers/admin/meetings_controller_spec.rb
@@ -0,0 +1,31 @@
+RSpec.describe Admin::MeetingsController do
+  let(:member) { Fabricate(:member) }
+  let(:meeting) { Fabricate(:meeting) }
+
+  before do
+    member.add_role(:organiser, meeting)
+    login(member)
+  end
+
+  describe 'GET #new' do
+    render_views
+
+    it 'renders with native date and time inputs' do
+      get :new
+
+      expect(response.body).to include('type="date"')
+      expect(response.body).to include('type="time"')
+    end
+  end
+
+  describe 'GET #edit' do
+    render_views
+
+    it 'pre-fills date and time values in ISO format' do
+      get :edit, params: { id: meeting.slug }
+
+      expect(response.body).to include("value=\"#{meeting.date_and_time.strftime('%Y-%m-%d')}\"")
+      expect(response.body).to include("value=\"#{meeting.time.strftime('%H:%M')}\"")
+    end
+  end
+end
diff --git a/spec/controllers/admin/workshops_controller_spec.rb b/spec/controllers/admin/workshops_controller_spec.rb
index 431788556..d74de08a7 100644
--- a/spec/controllers/admin/workshops_controller_spec.rb
+++ b/spec/controllers/admin/workshops_controller_spec.rb
@@ -252,4 +252,45 @@ def assigns(symbol)
       end
     end
   end
+
+  describe 'GET #new' do
+    render_views
+
+    it 'renders with native date and time inputs for main and RSVP fields' do
+      get :new
+
+      expect(response.body).to include('type="date"')
+      expect(response.body).to include('type="time"')
+      expect(response.body.scan('type="date"').size).to be >= 3 # main date + RSVP open + RSVP close
+      expect(response.body.scan('type="time"').size).to be >= 3 # main time + RSVP open + RSVP close
+    end
+  end
+
+  describe 'GET #edit' do
+    render_views
+
+    it 'pre-fills main date and time values in ISO format' do
+      get :edit, params: { id: workshop.id }
+
+      expect(response.body).to include("value=\"#{workshop.date_and_time.strftime('%Y-%m-%d')}\"")
+      expect(response.body).to include("value=\"#{workshop.time.strftime('%H:%M')}\"")
+    end
+
+    context 'with RSVP windows set' do
+      let(:workshop) do
+        Fabricate(:workshop,
+                  rsvp_opens_at: 1.day.from_now,
+                  rsvp_closes_at: 2.days.from_now)
+      end
+
+      it 'pre-fills RSVP date and time values in ISO format' do
+        get :edit, params: { id: workshop.id }
+
+        expect(response.body).to include("value=\"#{workshop.rsvp_opens_at.strftime('%Y-%m-%d')}\"")
+        expect(response.body).to include("value=\"#{workshop.rsvp_opens_at.strftime('%H:%M')}\"")
+        expect(response.body).to include("value=\"#{workshop.rsvp_closes_at.strftime('%Y-%m-%d')}\"")
+        expect(response.body).to include("value=\"#{workshop.rsvp_closes_at.strftime('%H:%M')}\"")
+      end
+    end
+  end
 end
diff --git a/spec/features/admin/announcements_spec.rb b/spec/features/admin/announcements_spec.rb
index 154f48511..e7d903313 100644
--- a/spec/features/admin/announcements_spec.rb
+++ b/spec/features/admin/announcements_spec.rb
@@ -39,6 +39,18 @@
         expect(page).to have_text('New event coming up soon! Stay tuned.')
         expect(page).to have_current_path(admin_announcements_path, ignore_query: true)
       end
+
+      scenario 'by updating the expires at date' do
+        announcement = Fabricate(:announcement)
+        new_date = 2.weeks.from_now.to_date
+        visit edit_admin_announcement_path(announcement)
+        fill_in 'Expires at', with: new_date
+        click_on 'announcement[update]'
+
+        expect(page).to have_text('Announcement successfully updated')
+        announcement.reload
+        expect(announcement.expires_at.to_date).to eq(new_date)
+      end
     end
 
     scenario 'can view all announcements' do