diff --git a/client/src/components/Vacay/VacayMonthCard.tsx b/client/src/components/Vacay/VacayMonthCard.tsx
index cedf7d9..cc9a77f 100644
--- a/client/src/components/Vacay/VacayMonthCard.tsx
+++ b/client/src/components/Vacay/VacayMonthCard.tsx
@@ -3,19 +3,7 @@ import { useTranslation } from '../../i18n'
 import { isWeekend } from './holidays'
 import type { HolidaysMap, VacayEntry } from '../../types'
 
-const WEEKDAYS_EN = ['Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa', 'Su']
-const WEEKDAYS_DE = ['Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa', 'So']
-const WEEKDAYS_ES = ['Lu', 'Ma', 'Mi', 'Ju', 'Vi', 'Sa', 'Do']
-const WEEKDAYS_FR = ['Lu', 'Ma', 'Me', 'Je', 'Ve', 'Sa', 'Di']
-const WEEKDAYS_BR = ['Seg', 'Ter', 'Qua', 'Qui', 'Sex', 'Sáb', 'Dom']
-const WEEKDAYS_AR = ['اث', 'ثل', 'أر', 'خم', 'جم', 'سب', 'أح']
-
-const MONTHS_EN = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']
-const MONTHS_DE = ['Januar', 'Februar', 'März', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember']
-const MONTHS_ES = ['Enero', 'Febrero', 'Marzo', 'Abril', 'Mayo', 'Junio', 'Julio', 'Agosto', 'Septiembre', 'Octubre', 'Noviembre', 'Diciembre']
-const MONTHS_FR = ['Janvier', 'Février', 'Mars', 'Avril', 'Mai', 'Juin', 'Juillet', 'Août', 'Septembre', 'Octobre', 'Novembre', 'Décembre']
-const MONTHS_BR = ['Janeiro', 'Fevereiro', 'Março', 'Abril', 'Maio', 'Junho', 'Julho', 'Agosto', 'Setembro', 'Outubro', 'Novembro', 'Dezembro']
-const MONTHS_AR = ['يناير', 'فبراير', 'مارس', 'أبريل', 'مايو', 'يونيو', 'يوليو', 'أغسطس', 'سبتمبر', 'أكتوبر', 'نوفمبر', 'ديسمبر']
+const WEEKDAY_KEYS = ['vacay.mon', 'vacay.tue', 'vacay.wed', 'vacay.thu', 'vacay.fri', 'vacay.sat', 'vacay.sun'] as const
 
 function hexToRgba(hex: string, alpha: number): string {
   const r = parseInt(hex.slice(1, 3), 16)
@@ -41,10 +29,10 @@ export default function VacayMonthCard({
   year, month, holidays, companyHolidaySet, companyHolidaysEnabled = true, entryMap,
   onCellClick, companyMode, blockWeekends, weekendDays = [0, 6]
 }: VacayMonthCardProps) {
-  const { language } = useTranslation()
-  
-  const weekdays = language === 'de' ? WEEKDAYS_DE : language === 'es' ? WEEKDAYS_ES : language === 'fr' ? WEEKDAYS_FR : language === 'br' ? WEEKDAYS_BR : language === 'ar' ? WEEKDAYS_AR : WEEKDAYS_EN
-  const monthNames = language === 'de' ? MONTHS_DE : language === 'es' ? MONTHS_ES : language === 'fr' ? MONTHS_FR : language === 'br' ? MONTHS_BR : language === 'ar' ? MONTHS_AR : MONTHS_EN
+  const { t, locale } = useTranslation()
+
+  const weekdays = WEEKDAY_KEYS.map(k => t(k))
+  const monthName = useMemo(() => new Intl.DateTimeFormat(locale, { month: 'long' }).format(new Date(year, month, 1)), [locale, year, month])
   
   const weeks = useMemo(() => {
     const firstDay = new Date(year, month, 1)
@@ -65,7 +53,7 @@ export default function VacayMonthCard({
   return (
     <div className="rounded-xl border overflow-hidden" style={{ background: 'var(--bg-card)', borderColor: 'var(--border-primary)' }}>
       <div className="px-3 py-2 border-b" style={{ borderColor: 'var(--border-secondary)' }}>
-        <span className="text-xs font-semibold" style={{ color: 'var(--text-primary)' }}>{monthNames[month]}</span>
+        <span className="text-xs font-semibold" style={{ color: 'var(--text-primary)', textTransform: 'capitalize' }}>{monthName}</span>
       </div>
 
       <div className="grid grid-cols-7 border-b" style={{ borderColor: 'var(--border-secondary)' }}>