diff --git a/app/javascript/flavours/glitch/components/edited_timestamp/index.jsx b/app/javascript/flavours/glitch/components/edited_timestamp/index.jsx
index 29a418dfb1..2363f132f1 100644
--- a/app/javascript/flavours/glitch/components/edited_timestamp/index.jsx
+++ b/app/javascript/flavours/glitch/components/edited_timestamp/index.jsx
@@ -68,7 +68,7 @@ class EditedTimestamp extends PureComponent {
     return (
       <DropdownMenu statusId={statusId} renderItem={this.renderItem} scrollable renderHeader={this.renderHeader} onItemClick={this.handleItemClick}>
         <button className='dropdown-menu__text-button'>
-          <FormattedMessage id='status.edited' defaultMessage='Edited {date}' values={{ date: intl.formatDate(timestamp, { hour12: false, month: 'short', day: '2-digit', hour: '2-digit', minute: '2-digit' }) }} /> <Icon id='caret-down' icon={ArrowDropDownIcon} />
+          <FormattedMessage id='status.edited' defaultMessage='Edited {date}' values={{ date: intl.formatDate(timestamp, { month: 'short', day: '2-digit', hour: '2-digit', minute: '2-digit' }) }} /> <Icon id='caret-down' icon={ArrowDropDownIcon} />
         </button>
       </DropdownMenu>
     );
diff --git a/app/javascript/flavours/glitch/components/relative_timestamp.tsx b/app/javascript/flavours/glitch/components/relative_timestamp.tsx
index ac3ab0fb4d..12530c2b17 100644
--- a/app/javascript/flavours/glitch/components/relative_timestamp.tsx
+++ b/app/javascript/flavours/glitch/components/relative_timestamp.tsx
@@ -53,7 +53,6 @@ const messages = defineMessages({
 });
 
 const dateFormatOptions = {
-  hour12: false,
   year: 'numeric',
   month: 'short',
   day: '2-digit',
diff --git a/app/javascript/flavours/glitch/components/status_action_bar.jsx b/app/javascript/flavours/glitch/components/status_action_bar.jsx
index c10122d234..f27719a6b9 100644
--- a/app/javascript/flavours/glitch/components/status_action_bar.jsx
+++ b/app/javascript/flavours/glitch/components/status_action_bar.jsx
@@ -351,7 +351,7 @@ class StatusActionBar extends ImmutablePureComponent {
 
         <div className='status__action-bar-spacer' />
         <a href={status.get('url')} className='status__relative-time' target='_blank' rel='noopener'>
-          <RelativeTimestamp timestamp={status.get('created_at')} />{status.get('edited_at') && <abbr title={intl.formatMessage(messages.edited, { date: intl.formatDate(status.get('edited_at'), { hour12: false, year: 'numeric', month: 'short', day: '2-digit', hour: '2-digit', minute: '2-digit' }) })}> *</abbr>}
+          <RelativeTimestamp timestamp={status.get('created_at')} />{status.get('edited_at') && <abbr title={intl.formatMessage(messages.edited, { date: intl.formatDate(status.get('edited_at'), { year: 'numeric', month: 'short', day: '2-digit', hour: '2-digit', minute: '2-digit' }) })}> *</abbr>}
         </a>
       </div>
     );
diff --git a/app/javascript/flavours/glitch/features/account/components/header.jsx b/app/javascript/flavours/glitch/features/account/components/header.jsx
index 29e3aa32f7..b2aee7682a 100644
--- a/app/javascript/flavours/glitch/features/account/components/header.jsx
+++ b/app/javascript/flavours/glitch/features/account/components/header.jsx
@@ -84,7 +84,6 @@ const dateFormatOptions = {
   month: 'short',
   day: 'numeric',
   year: 'numeric',
-  hour12: false,
   hour: '2-digit',
   minute: '2-digit',
 };
diff --git a/app/javascript/flavours/glitch/features/getting_started/components/announcements.jsx b/app/javascript/flavours/glitch/features/getting_started/components/announcements.jsx
index 27470d9938..0ff0a863b3 100644
--- a/app/javascript/flavours/glitch/features/getting_started/components/announcements.jsx
+++ b/app/javascript/flavours/glitch/features/getting_started/components/announcements.jsx
@@ -343,7 +343,7 @@ class Announcement extends ImmutablePureComponent {
       <div className='announcements__item'>
         <strong className='announcements__item__range'>
           <FormattedMessage id='announcement.announcement' defaultMessage='Announcement' />
-          {hasTimeRange && <span> · <FormattedDate value={startsAt} hour12={false} year={(skipYear || startsAt.getFullYear() === now.getFullYear()) ? undefined : 'numeric'} month='short' day='2-digit' hour={skipTime ? undefined : '2-digit'} minute={skipTime ? undefined : '2-digit'} /> - <FormattedDate value={endsAt} hour12={false} year={(skipYear || endsAt.getFullYear() === now.getFullYear()) ? undefined : 'numeric'} month={skipEndDate ? undefined : 'short'} day={skipEndDate ? undefined : '2-digit'} hour={skipTime ? undefined : '2-digit'} minute={skipTime ? undefined : '2-digit'} /></span>}
+          {hasTimeRange && <span> · <FormattedDate value={startsAt} year={(skipYear || startsAt.getFullYear() === now.getFullYear()) ? undefined : 'numeric'} month='short' day='2-digit' hour={skipTime ? undefined : '2-digit'} minute={skipTime ? undefined : '2-digit'} /> - <FormattedDate value={endsAt} year={(skipYear || endsAt.getFullYear() === now.getFullYear()) ? undefined : 'numeric'} month={skipEndDate ? undefined : 'short'} day={skipEndDate ? undefined : '2-digit'} hour={skipTime ? undefined : '2-digit'} minute={skipTime ? undefined : '2-digit'} /></span>}
         </strong>
 
         <Content announcement={announcement} />
diff --git a/app/javascript/flavours/glitch/features/status/components/detailed_status.jsx b/app/javascript/flavours/glitch/features/status/components/detailed_status.jsx
index 0638d0d646..2a3ab7001b 100644
--- a/app/javascript/flavours/glitch/features/status/components/detailed_status.jsx
+++ b/app/javascript/flavours/glitch/features/status/components/detailed_status.jsx
@@ -331,7 +331,7 @@ class DetailedStatus extends ImmutablePureComponent {
 
           <div className='detailed-status__meta'>
             <a className='detailed-status__datetime' href={status.get('url')} target='_blank' rel='noopener noreferrer'>
-              <FormattedDate value={new Date(status.get('created_at'))} hour12={false} year='numeric' month='short' day='2-digit' hour='2-digit' minute='2-digit' />
+              <FormattedDate value={new Date(status.get('created_at'))} year='numeric' month='short' day='2-digit' hour='2-digit' minute='2-digit' />
             </a>{edited}{visibilityLink}{applicationLink}{reblogLink} · {favouriteLink}
           </div>
         </div>
diff --git a/app/javascript/flavours/glitch/packs/public.jsx b/app/javascript/flavours/glitch/packs/public.jsx
index 5a72f91786..dab33b3904 100644
--- a/app/javascript/flavours/glitch/packs/public.jsx
+++ b/app/javascript/flavours/glitch/packs/public.jsx
@@ -60,7 +60,6 @@ function main() {
 
   const timeFormat = new Intl.DateTimeFormat(locale, {
     timeStyle: 'short',
-    hour12: false,
   });
 
   const formatMessage = ({ id, defaultMessage }, values) => {