diff --git a/src/SIL.XForge.Scripture/ClientApp/src/app/app.component.html b/src/SIL.XForge.Scripture/ClientApp/src/app/app.component.html
index 9a3062617d..a224a87edb 100644
--- a/src/SIL.XForge.Scripture/ClientApp/src/app/app.component.html
+++ b/src/SIL.XForge.Scripture/ClientApp/src/app/app.component.html
@@ -197,6 +197,7 @@
     <!-- The cdkScrollable attribute is needed so the CDK can listen to scroll events within this container -->
     <div #appContent cdkScrollable class="app-content" [dir]="i18n.direction">
       <div>
+        <app-global-notices></app-global-notices>
         <router-outlet></router-outlet>
         @if (showCheckingDisabled) {
           <p class="checking-unavailable">{{ t("scripture_checking_not_available") }}</p>
diff --git a/src/SIL.XForge.Scripture/ClientApp/src/app/app.module.ts b/src/SIL.XForge.Scripture/ClientApp/src/app/app.module.ts
index 1fbdf4f17a..6cc5897130 100644
--- a/src/SIL.XForge.Scripture/ClientApp/src/app/app.module.ts
+++ b/src/SIL.XForge.Scripture/ClientApp/src/app/app.module.ts
@@ -33,6 +33,7 @@ import { ProjectComponent } from './project/project.component';
 import { ScriptureChooserDialogComponent } from './scripture-chooser-dialog/scripture-chooser-dialog.component';
 import { DeleteProjectDialogComponent } from './settings/delete-project-dialog/delete-project-dialog.component';
 import { SettingsComponent } from './settings/settings.component';
+import { GlobalNoticesComponent } from './shared/global-notices/global-notices.component';
 import { SharedModule } from './shared/shared.module';
 import { TextNoteDialogComponent } from './shared/text/text-note-dialog/text-note-dialog.component';
 import { SyncComponent } from './sync/sync.component';
@@ -75,7 +76,8 @@ import { UsersModule } from './users/users.module';
     AppRoutingModule,
     SharedModule,
     AvatarComponent,
-    MatRipple
+    MatRipple,
+    GlobalNoticesComponent
   ],
   providers: [
     CookieService,
diff --git a/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.component.html b/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.component.html
new file mode 100644
index 0000000000..82d34333d5
--- /dev/null
+++ b/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.component.html
@@ -0,0 +1,20 @@
+<ng-container *transloco="let t; read: 'global_notices'">
+  @if (showDowntimeNotice) {
+    <app-notice class="downtime-notice" type="warning" mode="fill-dark" icon="construction">
+      <div class="downtime-notice-content-wrapper">
+        <div>
+          {{
+            t("upcoming_maintenance", {
+              duration,
+              startTime: i18n.formatDate(upcomingDowntime.start, { showTimeZone: true })
+            })
+          }}
+          <a [href]="upcomingDowntime.detailsUrl" target="_blank">{{ t("learn_more") }}</a>
+        </div>
+        <button mat-icon-button (click)="showDowntimeNotice = false" [matTooltip]="t('close')">
+          <mat-icon>close</mat-icon>
+        </button>
+      </div>
+    </app-notice>
+  }
+</ng-container>
diff --git a/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.component.scss b/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.component.scss
new file mode 100644
index 0000000000..0c76028533
--- /dev/null
+++ b/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.component.scss
@@ -0,0 +1,12 @@
+.downtime-notice {
+  margin: 0 auto 12px;
+  padding-block: 6px;
+  width: 65em;
+  max-width: 100%;
+}
+
+.downtime-notice-content-wrapper {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
diff --git a/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.component.ts b/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.component.ts
new file mode 100644
index 0000000000..8aefd8a25a
--- /dev/null
+++ b/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.component.ts
@@ -0,0 +1,44 @@
+import { CommonModule } from '@angular/common';
+import { Component, Input, OnInit } from '@angular/core';
+import { MatButtonModule } from '@angular/material/button';
+import { MatIconModule } from '@angular/material/icon';
+import { MatTooltipModule } from '@angular/material/tooltip';
+import { TranslocoModule } from '@ngneat/transloco';
+import { I18nService } from 'xforge-common/i18n.service';
+import { NoticeComponent } from '../notice/notice.component';
+
+@Component({
+  selector: 'app-global-notices',
+  standalone: true,
+  imports: [CommonModule, NoticeComponent, MatIconModule, MatButtonModule, MatTooltipModule, TranslocoModule],
+  templateUrl: './global-notices.component.html',
+  styleUrl: './global-notices.component.scss'
+})
+export class GlobalNoticesComponent implements OnInit {
+  // This is only an input so that the Storybook can turn this on even when it's off in the app
+  @Input() showDowntimeNotice = false;
+
+  upcomingDowntime = {
+    start: new Date('2024-12-11 16:30 UTC'),
+    durationMin: 2,
+    durationMax: 3,
+    durationUnit: 'hour',
+    detailsUrl: 'https://software.sil.org/scriptureforge/news/'
+  } as const;
+
+  constructor(readonly i18n: I18nService) {}
+
+  get duration(): string {
+    return this.i18n.translateStatic(`global_notices.${this.upcomingDowntime.durationUnit}_range`, {
+      min: this.upcomingDowntime.durationMin,
+      max: this.upcomingDowntime.durationMax
+    });
+  }
+
+  ngOnInit(): void {
+    const fifteenMinutesMs = 15 * 60 * 1000;
+    const fifteenMinutesPastStart = new Date(this.upcomingDowntime.start.getTime() + fifteenMinutesMs);
+    // Show the downtime notice up until 15 minutes past the start time.
+    this.showDowntimeNotice = new Date() <= fifteenMinutesPastStart;
+  }
+}
diff --git a/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.stories.ts b/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.stories.ts
new file mode 100644
index 0000000000..da8dc93fbe
--- /dev/null
+++ b/src/SIL.XForge.Scripture/ClientApp/src/app/shared/global-notices/global-notices.stories.ts
@@ -0,0 +1,14 @@
+import { Meta, StoryObj } from '@storybook/angular';
+import { GlobalNoticesComponent } from './global-notices.component';
+
+const meta: Meta<GlobalNoticesComponent> = {
+  title: 'Shared/Global Notices',
+  component: GlobalNoticesComponent
+};
+
+export default meta;
+type Story = StoryObj<GlobalNoticesComponent>;
+
+export const Default: Story = {
+  args: { showDowntimeNotice: true }
+};
diff --git a/src/SIL.XForge.Scripture/ClientApp/src/assets/i18n/checking_en.json b/src/SIL.XForge.Scripture/ClientApp/src/assets/i18n/checking_en.json
index 3f42391573..36543a08f7 100644
--- a/src/SIL.XForge.Scripture/ClientApp/src/assets/i18n/checking_en.json
+++ b/src/SIL.XForge.Scripture/ClientApp/src/assets/i18n/checking_en.json
@@ -343,6 +343,13 @@
   "font_size": {
     "text_size": "Text size"
   },
+  "global_notices": {
+    "close": "Close",
+    "hour_range": "{{ min }} to {{ max }} hours",
+    "learn_more": "Learn more",
+    "minute_range": "{{ min }} to {{ max }} minutes",
+    "upcoming_maintenance": "Scripture Forge will be down for maintenance for about {{ duration }} starting at {{ startTime }}."
+  },
   "issue_email": {
     "heading": "Please explain the problem.",
     "technical_details": "Technical details",
diff --git a/src/SIL.XForge.Scripture/ClientApp/src/xforge-common/i18n.service.spec.ts b/src/SIL.XForge.Scripture/ClientApp/src/xforge-common/i18n.service.spec.ts
index 5d26862555..1540c065ad 100644
--- a/src/SIL.XForge.Scripture/ClientApp/src/xforge-common/i18n.service.spec.ts
+++ b/src/SIL.XForge.Scripture/ClientApp/src/xforge-common/i18n.service.spec.ts
@@ -121,6 +121,20 @@ describe('I18nService', () => {
     expect(service.formatDate(date)).toEqual('25.11.1991 17:28');
   });
 
+  it('should support including the timezone in the date', () => {
+    const date = new Date('November 25, 1991 17:28');
+    const service = getI18nService();
+
+    // look for ending with something like " UTC+5" or " EST"
+    const trailingTimezoneRegex = / (UTC[\-+−]\d+|[A-Z]+)$/;
+
+    service.setLocale('fr');
+    expect(service.formatDate(date, { showTimeZone: true })).toMatch(trailingTimezoneRegex);
+
+    service.setLocale('az');
+    expect(service.formatDate(date, { showTimeZone: true })).toMatch(trailingTimezoneRegex);
+  });
+
   it('should interpolate translations around and within numbered template tags', done => {
     when(mockedTranslocoService.selectTranslate<string>('app.settings', anything())).thenReturn(
       of('A quick brown { 1 }fox{ 2 } jumps over the lazy { 3 }dog{ 4 }.')
diff --git a/src/SIL.XForge.Scripture/ClientApp/src/xforge-common/i18n.service.ts b/src/SIL.XForge.Scripture/ClientApp/src/xforge-common/i18n.service.ts
index a21fd1f10f..b4f05f05c3 100644
--- a/src/SIL.XForge.Scripture/ClientApp/src/xforge-common/i18n.service.ts
+++ b/src/SIL.XForge.Scripture/ClientApp/src/xforge-common/i18n.service.ts
@@ -18,7 +18,7 @@ import { Locale, LocaleDirection } from './models/i18n-locale';
 import { PseudoLocalization } from './pseudo-localization';
 import { ASP_CULTURE_COOKIE_NAME, aspCultureCookieValue, getAspCultureCookieLanguage, getI18nLocales } from './utils';
 
-export type DateFormat = Intl.DateTimeFormatOptions | ((date: Date) => string);
+export type DateFormat = Intl.DateTimeFormatOptions | ((date: Date, options: { showTimeZone?: boolean }) => string);
 
 export interface TextAroundTemplate {
   before: string;
@@ -74,8 +74,13 @@ export class I18nService {
     en: { month: 'short' },
     'en-GB': { month: 'short', hour12: true },
     // Chrome formats az dates as en-US. This manual override is the format Firefox uses for az
-    az: (d: Date) =>
-      `${pad(d.getDate())}.${pad(d.getMonth() + 1)}.${d.getFullYear()} ${pad(d.getHours())}:${pad(d.getMinutes())}`,
+    az: (d: Date, options) => {
+      let s = `${pad(d.getDate())}.${pad(d.getMonth() + 1)}.${d.getFullYear()} ${pad(d.getHours())}:${pad(d.getMinutes())}`;
+      if (options.showTimeZone) {
+        s += ` ${I18nService.getHumanReadableTimeZoneOffset('az', d)}`;
+      }
+      return s;
+    },
     [PseudoLocalization.locale.canonicalTag]: PseudoLocalization.dateFormat
   };
 
@@ -234,6 +239,13 @@ export class I18nService {
     return this.transloco.selectTranslate<string>(key, params);
   }
 
+  /** Returns a translation for the given I18nKey. A string is returned, so this cannot be used to keep a localization
+   * updated without re-calling this whenever the locale changes. Avoid using this when observing a localization is
+   * possible. */
+  translateStatic(key: I18nKey, params: object = {}): string {
+    return this.transloco.translate(key, params);
+  }
+
   translateAndInsertTags(key: I18nKey, params: object = {}): string {
     return this.transloco.translate(key, {
       ...params,
@@ -249,15 +261,23 @@ export class I18nService {
     });
   }
 
-  formatDate(date: Date): string {
+  formatDate(date: Date, options: { showTimeZone?: boolean } = {}): string {
     // fall back to en in the event the language code isn't valid
     const format = I18nService.dateFormats[this.localeCode] || {};
     return typeof format === 'function'
-      ? format(date)
+      ? format(date, options)
       : date.toLocaleString(
           [this.localeCode, I18nService.defaultLocale.canonicalTag],
           // Browser default is all numeric, but includes seconds. This is same as default, but without seconds
-          { month: 'numeric', year: 'numeric', day: 'numeric', hour: 'numeric', minute: 'numeric', ...format }
+          {
+            month: 'numeric',
+            year: 'numeric',
+            day: 'numeric',
+            hour: 'numeric',
+            minute: 'numeric',
+            ...(options?.showTimeZone ? { timeZoneName: 'short' } : {}),
+            ...format
+          }
         );
   }
 
@@ -369,6 +389,12 @@ export class I18nService {
     }
   }
 
+  static getHumanReadableTimeZoneOffset(localeCode: string, date: Date): string {
+    return new Intl.DateTimeFormat(localeCode, { timeZoneName: 'short' })
+      .formatToParts(date)
+      .find(e => e.type === 'timeZoneName').value;
+  }
+
   private getTranslation(key: I18nKey): string {
     return (
       this.transloco.getTranslation(this.transloco.getActiveLang())[key] ??