diff --git a/components/CalendarBanner.vue b/components/CalendarBanner.vue
index f340b58f1..c6fe894a8 100644
--- a/components/CalendarBanner.vue
+++ b/components/CalendarBanner.vue
@@ -1,3 +1,21 @@
+<script setup lang="ts">
+import useConfig from '../composables/useConfig.ts';
+import { Day } from '../src/calendar/helpers.ts';
+import { loadCalendar } from '../src/data.ts';
+
+const props = withDefaults(defineProps<{
+    day?: Day;
+    link?: boolean;
+}>(), {
+    day: () => Day.today(),
+});
+
+const config = useConfig();
+
+const calendar = await loadCalendar();
+const events = calendar.getCurrentYear()!.eventsByDate[props.day.toString()];
+</script>
+
 <template>
     <section
         v-if="config.calendar && config.calendar.enabled && events !== undefined"
@@ -23,26 +41,3 @@
         </nuxt-link>
     </section>
 </template>
-
-<script lang="ts">
-import { defineComponent } from 'vue';
-
-import useConfig from '../composables/useConfig.ts';
-import { buildCalendar } from '../src/calendar/calendar.ts';
-import { Day } from '../src/calendar/helpers.ts';
-
-export default defineComponent({
-    props: {
-        day: { default: () => Day.today(), type: Day },
-        link: { type: Boolean },
-    },
-    setup(props) {
-        const runtimeConfig = useRuntimeConfig();
-
-        return {
-            config: useConfig(),
-            events: buildCalendar(runtimeConfig.public.baseUrl).getCurrentYear()!.eventsByDate[props.day.toString()],
-        };
-    },
-});
-</script>
diff --git a/components/Logo.vue b/components/Logo.vue
index eba9aa0a6..2ee9fcf57 100644
--- a/components/Logo.vue
+++ b/components/Logo.vue
@@ -25,8 +25,8 @@ import { storeToRefs } from 'pinia';
 import { defineComponent } from 'vue';
 
 import logoSvg from '../public/logo/logo.svg?raw';
-import { buildCalendar } from '../src/calendar/calendar.ts';
 import { Day } from '../src/calendar/helpers.ts';
+import { loadCalendar } from '../src/data.ts';
 import { ImmutableArray } from '../src/helpers.ts';
 import { useMainStore } from '../store/index.ts';
 
@@ -47,8 +47,7 @@ export default defineComponent({
         day: { default: () => Day.today(), type: Day },
     },
     async setup() {
-        const runtimeConfig = useRuntimeConfig();
-
+        const calendarPromise = loadCalendar();
         const { data: stats } = await useFetch<{ overall: { users: number } }>(
             '/api/admin/stats-public',
             { lazy: true },
@@ -57,7 +56,7 @@ export default defineComponent({
         return {
             stats,
             selectedDay: storeToRefs(useMainStore()).selectedDay,
-            calendar: buildCalendar(runtimeConfig.public.baseUrl),
+            calendar: await calendarPromise,
         };
     },
     data(): Data {
diff --git a/components/Profile.vue b/components/Profile.vue
index 89e1ebd56..526ea2b4b 100644
--- a/components/Profile.vue
+++ b/components/Profile.vue
@@ -4,9 +4,8 @@ import { useNuxtApp } from 'nuxt/app';
 import useConfig from '~/composables/useConfig.ts';
 import useMainPronoun from '~/composables/useMainPronoun.ts';
 import useSpelling from '~/composables/useSpelling.ts';
-import { buildCalendar } from '~/src/calendar/calendar.ts';
 import type { TermsEntryRaw } from '~/src/classes.ts';
-import { loadPronounLibrary } from '~/src/data.ts';
+import { loadCalendar, loadPronounLibrary } from '~/src/data.ts';
 import { buildFlags } from '~/src/flags.ts';
 import { buildImageUrl } from '~/src/helpers.ts';
 import type { Profile, UserWithProfiles } from '~/src/profile.ts';
@@ -24,7 +23,6 @@ const props = withDefaults(defineProps<{
 const { $translator: translator } = useNuxtApp();
 const { convertName } = useSpelling();
 const config = useConfig();
-const runtimeConfig = useRuntimeConfig();
 
 const pronounLibrary = await loadPronounLibrary(config);
 
@@ -40,7 +38,7 @@ const normaliseUrl = (url: string): string | null => {
 
 const allFlags = buildFlags(config.locale);
 const minAge = config.ageLimit || 13;
-const year = buildCalendar(runtimeConfig.public.baseUrl).getCurrentYear();
+const year = (await loadCalendar()).getCurrentYear();
 
 const countFlags = computed(() => {
     return (props.profile.flags?.length ?? 0) + (props.profile.customFlags?.length ?? 0);
diff --git a/components/TermsDictionary.vue b/components/TermsDictionary.vue
index 36ee91708..7170b6aef 100644
--- a/components/TermsDictionary.vue
+++ b/components/TermsDictionary.vue
@@ -3,9 +3,9 @@ import type { ComponentExposed } from 'vue-component-type-helpers';
 
 import type Table from '~/components/Table.vue';
 import type TermsSubmitForm from '~/components/TermsSubmitForm.vue';
-import { buildCalendar } from '~/src/calendar/calendar.ts';
 import { TermsEntry } from '~/src/classes.ts';
 import type { TermsEntryRaw } from '~/src/classes.ts';
+import { loadCalendar } from '~/src/data.ts';
 import { buildDict, clearLinkedText } from '~/src/helpers.ts';
 
 const props = defineProps<{
@@ -13,7 +13,6 @@ const props = defineProps<{
 }>();
 
 const { $translator: translator } = useNuxtApp();
-const runtimeConfig = useRuntimeConfig();
 const config = useConfig();
 const filter = useFilterWithCategory();
 
@@ -108,7 +107,7 @@ const remove = async (entry: TermsEntry): Promise<void> => {
     delete entries.value[entry.id];
 };
 
-const year = buildCalendar(runtimeConfig.public.baseUrl).getCurrentYear()!;
+const year = (await loadCalendar()).getCurrentYear()!;
 </script>
 
 <template>
diff --git a/nuxt.config.ts b/nuxt.config.ts
index 88ef533ce..551bbb8dd 100644
--- a/nuxt.config.ts
+++ b/nuxt.config.ts
@@ -240,9 +240,18 @@ export default defineNuxtConfig({
             }
         },
         async 'nitro:config'(nitroConfig) {
-            if (nitroConfig.publicAssets === undefined) {
-                nitroConfig.publicAssets = [];
-            }
+            nitroConfig.virtual ??= {};
+            // workaround to have a dynamic import with variables which currently does not work in Rollup
+            // https://github.com/rollup/rollup/issues/2097
+            nitroConfig.virtual['#virtual/calendar/events.ts'] = () => {
+                const imports = localeDescriptions.map((locale) => {
+                    return `${locale.code}: async () =>
+                            (await import('~/locale/${locale.code}/calendar/events.ts')).default`;
+                });
+                return `export default {${imports.join(', ')}};`;
+            };
+
+            nitroConfig.publicAssets ??= [];
             nitroConfig.publicAssets.push(...(await Promise.all(codes.map(async (code) => [{
                 baseURL: `/docs/${code}`,
                 dir: await resolvePath(`~/locale/${code}/docs`),
diff --git a/pages/calendar/[[year]].vue b/pages/calendar/[[year]].vue
index 555593cd5..3859daa8a 100644
--- a/pages/calendar/[[year]].vue
+++ b/pages/calendar/[[year]].vue
@@ -4,8 +4,8 @@ import { useNuxtApp, useRoute } from 'nuxt/app';
 import Page from '~/components/Page.vue';
 import useConfig from '~/composables/useConfig.ts';
 import useSimpleHead from '~/composables/useSimpleHead.ts';
-import { buildCalendar } from '~/src/calendar/calendar.ts';
 import { Day } from '~/src/calendar/helpers.ts';
+import { loadCalendar } from '~/src/data.ts';
 
 definePageMeta({
     name: 'calendar',
@@ -19,11 +19,10 @@ definePageMeta({
 });
 
 const { $translator: translator } = useNuxtApp();
-const runtimeConfig = useRuntimeConfig();
 const route = useRoute();
 const config = useConfig();
 
-const calendar = buildCalendar(runtimeConfig.public.baseUrl);
+const calendar = await loadCalendar();
 const year = route.params.year
     ? calendar.getYear(parseInt(route.params.year as string))
     : calendar.getCurrentYear();
diff --git a/pages/calendar/[year]-[month]-[day].vue b/pages/calendar/[year]-[month]-[day].vue
index 9d58a35fa..22ba6f07d 100644
--- a/pages/calendar/[year]-[month]-[day].vue
+++ b/pages/calendar/[year]-[month]-[day].vue
@@ -4,8 +4,8 @@ import { useNuxtApp, useRoute } from 'nuxt/app';
 import Page from '~/components/Page.vue';
 import useConfig from '~/composables/useConfig.ts';
 import useSimpleHead from '~/composables/useSimpleHead.ts';
-import { buildCalendar } from '~/src/calendar/calendar.ts';
 import { Day } from '~/src/calendar/helpers.ts';
+import { loadCalendar } from '~/src/data.ts';
 
 definePageMeta({
     name: 'calendarDay',
@@ -19,7 +19,6 @@ definePageMeta({
 });
 
 const { $translator: translator } = useNuxtApp();
-const runtimeConfig = useRuntimeConfig();
 const route = useRoute();
 
 const day = new Day(
@@ -34,7 +33,7 @@ useSimpleHead({
 }, translator);
 
 const config = useConfig();
-const year = buildCalendar(runtimeConfig.public.baseUrl).getYear(day.year);
+const year = (await loadCalendar()).getYear(day.year);
 
 const basic = route.query.layout === 'basic';
 </script>
diff --git a/pages/profile/editor.vue b/pages/profile/editor.vue
index 52df9af03..965b5dcd2 100644
--- a/pages/profile/editor.vue
+++ b/pages/profile/editor.vue
@@ -11,8 +11,7 @@ import useSimpleHead from '~/composables/useSimpleHead.ts';
 import type { Config } from '~/locale/config.ts';
 import { birthdateRange, formatDate, parseDate } from '~/src/birthdate.ts';
 import { buildPronounUsage } from '~/src/buildPronoun.ts';
-import { buildCalendar } from '~/src/calendar/calendar.ts';
-import { loadPronounLibrary } from '~/src/data.ts';
+import { loadCalendar, loadPronounLibrary } from '~/src/data.ts';
 import { buildList, isValidLink } from '~/src/helpers.ts';
 import { addPronounInjectionKey } from '~/src/injectionKeys.ts';
 import opinions from '~/src/opinions.ts';
@@ -224,7 +223,7 @@ const visibilityIcons = {
 } as Record<ProfileVisibility, string[]>;
 
 const runtimeConfig = useRuntimeConfig();
-const year = buildCalendar(runtimeConfig.public.baseUrl).getCurrentYear();
+const year = (await loadCalendar()).getCurrentYear();
 
 const { mainPronoun } = useMainPronoun(pronounLibrary, formData, translator);
 
diff --git a/server/api/search.get.ts b/server/api/search.get.ts
index aa5dba8c3..ea30683c0 100644
--- a/server/api/search.get.ts
+++ b/server/api/search.get.ts
@@ -7,7 +7,7 @@ import type { MatchInfo, SearchResult, AsPlainObject, Options } from 'minisearch
 
 import type { Config } from '~/locale/config.ts';
 import { getPosts } from '~/server/blog.ts';
-import { pronounLibrary, pronouns } from '~/server/data.ts';
+import { loadCalendar, pronounLibrary, pronouns } from '~/server/data.ts';
 import { getInclusiveEntries } from '~/server/express/inclusive.ts';
 import { getNounEntries } from '~/server/express/nouns.ts';
 import { getSourcesEntries } from '~/server/express/sources.ts';
@@ -15,7 +15,6 @@ import { getTermsEntries } from '~/server/express/terms.ts';
 import { loadSuml, loadSumlFromBase } from '~/server/loader.ts';
 import { rootDir } from '~/server/paths.ts';
 import { shortForVariant } from '~/src/buildPronoun.ts';
-import { buildCalendar } from '~/src/calendar/calendar.ts';
 import { Day } from '~/src/calendar/helpers.ts';
 import forbidden from '~/src/forbidden.ts';
 import { clearLinkedText, buildImageUrl } from '~/src/helpers.ts';
@@ -810,9 +809,7 @@ const kinds: SearchKind[] = [
             }
             const base = config.calendar?.route;
 
-            const runtimeConfig = useRuntimeConfig();
-
-            const calendar = buildCalendar(runtimeConfig.public.baseUrl);
+            const calendar = await loadCalendar();
             const year = Day.today().year;
 
             return (calendar.getYear(year)?.events ?? [])
diff --git a/server/calendar.ts b/server/calendar.ts
index 5f8dee382..3213f4bdd 100644
--- a/server/calendar.ts
+++ b/server/calendar.ts
@@ -5,11 +5,11 @@ import fs from 'fs';
 import Pageres from 'pageres';
 
 import type { Config } from '../locale/config.ts';
-import { buildCalendar } from '../src/calendar/calendar.ts';
 
 import dbConnection from './db.ts';
 
 import { loadSuml } from '~/server/loader.ts';
+import { buildCalendar } from '~/src/calendar/calendar.ts';
 
 const __dirname = new URL('.', import.meta.url).pathname;
 
@@ -60,7 +60,8 @@ const dumpNameDays = async (): Promise<void> => {
     const prevPath = `${__dirname}/../cache/calendar.json`;
     const prev = fs.existsSync(prevPath) ? JSON.parse(fs.readFileSync(prevPath, 'utf-8')) : {};
 
-    const current = buildCalendar(process.env.BASE_URL!).buildSummary();
+    const localEvents = (await import(`../locale/${config.locale}/calendar/events.ts`)).default;
+    const current = buildCalendar(localEvents, process.env.BASE_URL!).buildSummary();
     const changedYears = new Set();
     for (const day in current) {
         if (!Object.hasOwn(current, day)) {
diff --git a/server/data.ts b/server/data.ts
index 1bb54452a..8e1f650c1 100644
--- a/server/data.ts
+++ b/server/data.ts
@@ -1,6 +1,9 @@
+import localeEventImports from '#virtual/calendar/events.ts';
 import type { PronounExamplesData } from '~/locale/data.ts';
 import { rootDir } from '~/server/paths.ts';
 import { parsePronounGroups, parsePronouns } from '~/src/buildPronoun.ts';
+import { buildCalendar } from '~/src/calendar/calendar.ts';
+import type { Calendar } from '~/src/calendar/helpers.ts';
 import { PronounLibrary } from '~/src/classes.ts';
 import { loadTsv } from '~/src/tsv.ts';
 
@@ -10,3 +13,14 @@ const pronounGroups = parsePronounGroups(loadTsv(`${dataDir}/pronouns/pronounGro
 export const pronounLibrary = new PronounLibrary(global.config, pronounGroups, pronouns);
 
 export const pronounExamples = loadTsv(`${dataDir}/pronouns/examples.tsv`) as PronounExamplesData[];
+
+let calendar: Calendar | null = null;
+
+export const loadCalendar = async () => {
+    if (calendar === null) {
+        const runtimeConfig = useRuntimeConfig();
+        const localEvents = await localeEventImports[config.locale]();
+        calendar = buildCalendar(localEvents, runtimeConfig.public.baseUrl);
+    }
+    return calendar;
+};
diff --git a/server/express/calendar.ts b/server/express/calendar.ts
index 97aa769ed..d35675df4 100644
--- a/server/express/calendar.ts
+++ b/server/express/calendar.ts
@@ -6,7 +6,6 @@ import SQL from 'sql-template-strings';
 
 import type { LocaleDescription } from '../../locale/locales.ts';
 import type { Translations } from '../../locale/translations.ts';
-import { buildCalendar } from '../../src/calendar/calendar.ts';
 import { Calendar, Day } from '../../src/calendar/helpers.ts';
 import type { Event } from '../../src/calendar/helpers.ts';
 import { handleErrorAsync, clearLinkedText } from '../../src/helpers.ts';
@@ -15,13 +14,13 @@ import { loadSuml, loadSumlFromBase } from '../loader.ts';
 
 import { normalise } from './user.ts';
 
+import { loadCalendar } from '~/server/data.ts';
+
 // TODO caching? // import { caches } from "../../src/cache";
 
 const translations = loadSuml('translations') as Translations;
 const fallbackTranslations = loadSumlFromBase('locale/_base/translations') as Translations;
 
-const calendar = buildCalendar(process.env.BASE_URL!);
-
 const renderEvents = (yearEvents: Record<number, Event[]>, res: Response, onlyFirstDays: boolean = false, calNameExtra: string = '') => {
     const events = [];
     let i = 1;
@@ -79,7 +78,8 @@ const buildMessage = (events: string[], locale: LocaleDescription, day: Day, lin
     return message;
 };
 
-const eventsSummary = (day: Day, locale: LocaleDescription) => {
+const eventsSummary = async (day: Day, locale: LocaleDescription) => {
+    const calendar = await loadCalendar();
     const eventsRaw = calendar.getCurrentYear()!.eventsByDate[day.toString()];
 
     const link = `${locale.url}/${encodeURIComponent(config.calendar!.route!)}/${day}`;
@@ -126,14 +126,14 @@ interface ProfileRaw {
 const router = Router();
 
 router.get('/calendar/today', handleErrorAsync(async (req, res) => {
-    return res.json(eventsSummary(
+    return res.json(await eventsSummary(
         Day.today(),
         req.locales[config.locale],
     ));
 }));
 
 router.get('/calendar/:year-:month-:day', handleErrorAsync(async (req, res) => {
-    return res.json(eventsSummary(
+    return res.json(await eventsSummary(
         new Day(parseInt(req.params.year), parseInt(req.params.month), parseInt(req.params.day)),
         req.locales[config.locale],
     ));
@@ -142,6 +142,7 @@ router.get('/calendar/:year-:month-:day', handleErrorAsync(async (req, res) => {
 const routeBase = `/queer-calendar-${config.locale}`;
 
 router.get(`${routeBase}.ics`, handleErrorAsync(async (req, res) => {
+    const calendar = await loadCalendar();
     const events: Record<number, Event[]> = {};
     for (const year of calendar.getAllYears()) {
         events[year.year] = year.events;
@@ -151,6 +152,7 @@ router.get(`${routeBase}.ics`, handleErrorAsync(async (req, res) => {
 }));
 
 router.get(generateURIEncodedPathAlternative(`${routeBase}-@:username.ics`), handleErrorAsync(async (req, res) => {
+    const calendar = await loadCalendar();
     const profiles = await req.db.all<Pick<ProfileRaw, 'events' | 'customEvents'>>(SQL`
         SELECT events, customEvents FROM profiles p
         LEFT JOIN users u ON p.userId = u.id
@@ -176,6 +178,7 @@ router.get(generateURIEncodedPathAlternative(`${routeBase}-@:username.ics`), han
 }));
 
 router.get(`${routeBase}-:year-:uuid.ics`, handleErrorAsync(async (req, res) => {
+    const calendar = await loadCalendar();
     const year = calendar.getYear(parseInt(req.params.year));
     if (!year) {
         return res.status(404).json({ error: 'Not found' });
@@ -185,6 +188,7 @@ router.get(`${routeBase}-:year-:uuid.ics`, handleErrorAsync(async (req, res) =>
 }));
 
 router.get(`${routeBase}-:year.ics`, handleErrorAsync(async (req, res) => {
+    const calendar = await loadCalendar();
     const year = calendar.getYear(parseInt(req.params.year));
     if (!year) {
         return res.status(404).json({ error: 'Not found' });
diff --git a/src/calendar/calendar.ts b/src/calendar/calendar.ts
index e1f0a6f3b..e86c2ddb6 100644
--- a/src/calendar/calendar.ts
+++ b/src/calendar/calendar.ts
@@ -1,18 +1,8 @@
-import localEvents from '../../data/calendar/events.ts';
-import rawNamedays from '../../data/names/namedays.json' with { type: 'json' };
-import internationalEvents from '../../locale/_/calendar/events.ts';
+import internationalEvents from '~/locale/_/calendar/events.ts';
+import { Calendar } from '~/src/calendar/helpers.ts';
+import type { Event } from '~/src/calendar/helpers.ts';
 
-import { Calendar, Event, EventLevel, day } from './helpers.ts';
-
-const _namedays = Object.entries(rawNamedays as Record<string, string[]>)
-    .flatMap(([name, namedays]) => {
-        return namedays.map((nameday) => {
-            const [m, d] = nameday.split('-');
-            return new Event(`nameday$${name}`, null, parseInt(m), day(parseInt(d)), EventLevel.Nameday);
-        });
-    });
-
-export const buildCalendar = (baseUrl: string) => {
+export const buildCalendar = (localEvents: Event[], baseUrl: string) => {
     return new Calendar(
         [...internationalEvents, ...localEvents], // TODO , ...namedays
         baseUrl,
diff --git a/src/data.ts b/src/data.ts
index 54fd046e0..500502710 100644
--- a/src/data.ts
+++ b/src/data.ts
@@ -4,6 +4,7 @@ import { buildDict, buildList } from './helpers.ts';
 
 import type { Config } from '~/locale/config.ts';
 import type { PronounExamplesData } from '~/locale/data.ts';
+import { buildCalendar } from '~/src/calendar/calendar.ts';
 
 export const getLocale = () => {
     return useRuntimeConfig().public.locale;
@@ -97,3 +98,17 @@ export const loadNameCount = async () => {
         return {};
     }
 };
+
+export const loadCalendar = async () => {
+    const runtimeConfig = useRuntimeConfig();
+    const localEvents = (await import(`~/locale/${getLocale()}/calendar/events.ts`)).default;
+    /* const rawNamedays = (await import(`~/locale/${config.locale}/names/namedays.json`)).default;
+    const namedays = Object.entries(rawNamedays as Record<string, string[]>)
+        .flatMap(([name, namedays]) => {
+            return namedays.map((nameday) => {
+                const [m, d] = nameday.split('-');
+                return new Event(`nameday$${name}`, null, parseInt(m), day(parseInt(d)), EventLevel.Nameday);
+            });
+        }); */
+    return buildCalendar(localEvents, runtimeConfig.public.baseUrl);
+};
diff --git a/types/virtual.d.ts b/types/virtual.d.ts
new file mode 100644
index 000000000..6f2d3b391
--- /dev/null
+++ b/types/virtual.d.ts
@@ -0,0 +1,6 @@
+declare module '#virtual/calendar/events.ts' {
+    import type { Event } from '~/src/calendar/helpers.ts';
+
+    declare const localEventsByLocale: Record<string, () => Promise<Event[]>>;
+    export default localEventsByLocale;
+}