diff --git a/apps/server/src/services/i18n.spec.ts b/apps/server/src/services/i18n.spec.ts
index 00dfd113b..c5dc00cad 100644
--- a/apps/server/src/services/i18n.spec.ts
+++ b/apps/server/src/services/i18n.spec.ts
@@ -1,7 +1,6 @@
 import { LOCALES } from "@triliumnext/commons";
 import { readFileSync } from "fs";
 import { join } from "path";
-import { DAYJS_LOADER } from "./i18n";
 
 describe("i18n", () => {
     it("translations are valid JSON", () => {
@@ -16,13 +15,4 @@ describe("i18n", () => {
                 .not.toThrow();
         }
     });
-
-    it("all dayjs locales are valid", async () => {
-        for (const locale of LOCALES) {
-            const dayjsLoader = DAYJS_LOADER[locale.id];
-            expect(dayjsLoader, `Locale ${locale.id} missing.`).toBeDefined();
-
-            await dayjsLoader();
-        }
-    });
 });
diff --git a/apps/server/src/services/i18n.ts b/apps/server/src/services/i18n.ts
index 82eb6f408..5da578c88 100644
--- a/apps/server/src/services/i18n.ts
+++ b/apps/server/src/services/i18n.ts
@@ -4,32 +4,9 @@ import sql_init from "./sql_init.js";
 import { join } from "path";
 import { getResourceDir } from "./utils.js";
 import hidden_subtree from "./hidden_subtree.js";
-import { LOCALES, type Locale, type LOCALE_IDS } from "@triliumnext/commons";
+import { LOCALES, setDayjsLocale, type Locale, type LOCALE_IDS } from "@triliumnext/commons";
 import dayjs, { Dayjs } from "dayjs";
 
-// When adding a new locale, prefer the version with hyphen instead of underscore.
-export const DAYJS_LOADER: Record<LOCALE_IDS, () => Promise<typeof import("dayjs/locale/en.js")>> = {
-    "ar": () => import("dayjs/locale/ar.js"),
-    "cn": () => import("dayjs/locale/zh-cn.js"),
-    "de": () => import("dayjs/locale/de.js"),
-    "en": () => import("dayjs/locale/en.js"),
-    "en-GB": () => import("dayjs/locale/en-gb.js"),
-    "en_rtl": () => import("dayjs/locale/en.js"),
-    "es": () => import("dayjs/locale/es.js"),
-    "fa": () => import("dayjs/locale/fa.js"),
-    "fr": () => import("dayjs/locale/fr.js"),
-    "it": () => import("dayjs/locale/it.js"),
-    "he": () => import("dayjs/locale/he.js"),
-    "ja": () => import("dayjs/locale/ja.js"),
-    "ku": () => import("dayjs/locale/ku.js"),
-    "pt_br": () => import("dayjs/locale/pt-br.js"),
-    "pt": () => import("dayjs/locale/pt.js"),
-    "ro": () => import("dayjs/locale/ro.js"),
-    "ru": () => import("dayjs/locale/ru.js"),
-    "tw": () => import("dayjs/locale/zh-tw.js"),
-    "uk": () => import("dayjs/locale/uk.js"),
-}
-
 export async function initializeTranslations() {
     const resourceDir = getResourceDir();
     const Backend = (await import("i18next-fs-backend/cjs")).default;
@@ -46,10 +23,7 @@ export async function initializeTranslations() {
     });
 
     // Initialize dayjs locale.
-    const dayjsLocale = DAYJS_LOADER[locale];
-    if (dayjsLocale) {
-        dayjs.locale(await dayjsLocale());
-    }
+    await setDayjsLocale(locale);
 }
 
 export function ordinal(date: Dayjs) {
diff --git a/packages/commons/src/lib/dayjs.spec.ts b/packages/commons/src/lib/dayjs.spec.ts
new file mode 100644
index 000000000..43e3581a1
--- /dev/null
+++ b/packages/commons/src/lib/dayjs.spec.ts
@@ -0,0 +1,13 @@
+import { LOCALES } from "./i18n.js";
+import { DAYJS_LOADER } from "./dayjs.js";
+
+describe("dayjs", () => {
+    it("all dayjs locales are valid", async () => {
+        for (const locale of LOCALES) {
+            const dayjsLoader = DAYJS_LOADER[locale.id];
+            expect(dayjsLoader, `Locale ${locale.id} missing.`).toBeDefined();
+
+            await dayjsLoader();
+        }
+    });
+});
diff --git a/packages/commons/src/lib/dayjs.ts b/packages/commons/src/lib/dayjs.ts
index a75e0d1ea..3b59e120a 100644
--- a/packages/commons/src/lib/dayjs.ts
+++ b/packages/commons/src/lib/dayjs.ts
@@ -8,6 +8,7 @@ import isSameOrAfter from "dayjs/plugin/isSameOrAfter.js";
 import isSameOrBefore from "dayjs/plugin/isSameOrBefore.js";
 import quarterOfYear from "dayjs/plugin/quarterOfYear.js";
 import utc from "dayjs/plugin/utc.js";
+import { LOCALE_IDS } from "./i18n.js";
 
 dayjs.extend(advancedFormat);
 dayjs.extend(isBetween);
@@ -18,7 +19,39 @@ dayjs.extend(quarterOfYear);
 dayjs.extend(utc);
 //#endregion
 
+//#region Locales
+export const DAYJS_LOADER: Record<LOCALE_IDS, () => Promise<typeof import("dayjs/locale/en.js")>> = {
+    "ar": () => import("dayjs/locale/ar.js"),
+    "cn": () => import("dayjs/locale/zh-cn.js"),
+    "de": () => import("dayjs/locale/de.js"),
+    "en": () => import("dayjs/locale/en.js"),
+    "en-GB": () => import("dayjs/locale/en-gb.js"),
+    "en_rtl": () => import("dayjs/locale/en.js"),
+    "es": () => import("dayjs/locale/es.js"),
+    "fa": () => import("dayjs/locale/fa.js"),
+    "fr": () => import("dayjs/locale/fr.js"),
+    "it": () => import("dayjs/locale/it.js"),
+    "he": () => import("dayjs/locale/he.js"),
+    "ja": () => import("dayjs/locale/ja.js"),
+    "ku": () => import("dayjs/locale/ku.js"),
+    "pt_br": () => import("dayjs/locale/pt-br.js"),
+    "pt": () => import("dayjs/locale/pt.js"),
+    "ro": () => import("dayjs/locale/ro.js"),
+    "ru": () => import("dayjs/locale/ru.js"),
+    "tw": () => import("dayjs/locale/zh-tw.js"),
+    "uk": () => import("dayjs/locale/uk.js"),
+}
+
+async function setDayjsLocale(locale: LOCALE_IDS) {
+    const dayjsLocale = DAYJS_LOADER[locale];
+    if (dayjsLocale) {
+        dayjs.locale(await dayjsLocale());
+    }
+}
+//#endregion
+
 export {
     dayjs,
-    Dayjs
+    Dayjs,
+    setDayjsLocale
 };
diff --git a/packages/commons/src/lib/i18n.ts b/packages/commons/src/lib/i18n.ts
index eed5aec1b..9003ae786 100644
--- a/packages/commons/src/lib/i18n.ts
+++ b/packages/commons/src/lib/i18n.ts
@@ -11,6 +11,7 @@ export interface Locale {
     electronLocale?: "en" | "de" | "es" | "fr" | "zh_CN" | "zh_TW" | "ro" | "af" | "am" | "ar" | "bg" | "bn" | "ca" | "cs" | "da" | "el" | "en_GB" | "es_419" | "et" | "fa" | "fi" | "fil" | "gu" | "he" | "hi" | "hr" | "hu" | "id" | "it" | "ja" | "kn" | "ko" | "lt" | "lv" | "ml" | "mr" | "ms" | "nb" | "nl" | "pl" | "pt_BR" | "pt_PT" | "ru" | "sk" | "sl" | "sr" | "sv" | "sw" | "ta" | "te" | "th" | "tr" | "uk" | "ur" | "vi";
 }
 
+// When adding a new locale, prefer the version with hyphen instead of underscore.
 const UNSORTED_LOCALES = [
     { id: "cn", name: "简体中文", electronLocale: "zh_CN" },
     { id: "de", name: "Deutsch", electronLocale: "de" },