diff --git a/client/src/components/Dashboard/TimezoneWidget.tsx b/client/src/components/Dashboard/TimezoneWidget.tsx
index 5ee97e51..087937a7 100644
--- a/client/src/components/Dashboard/TimezoneWidget.tsx
+++ b/client/src/components/Dashboard/TimezoneWidget.tsx
@@ -51,6 +51,9 @@ export default function TimezoneWidget() {
   })
   const [now, setNow] = useState(Date.now())
   const [showAdd, setShowAdd] = useState(false)
+  const [customLabel, setCustomLabel] = useState('')
+  const [customTz, setCustomTz] = useState('')
+  const [customError, setCustomError] = useState('')
 
   useEffect(() => {
     const i = setInterval(() => setNow(Date.now()), 10000)
@@ -61,6 +64,20 @@ export default function TimezoneWidget() {
     localStorage.setItem('dashboard_timezones', JSON.stringify(zones))
   }, [zones])
 
+  const isValidTz = (tz: string) => {
+    try { Intl.DateTimeFormat('en-US', { timeZone: tz }).format(new Date()); return true } catch { return false }
+  }
+
+  const addCustomZone = () => {
+    const tz = customTz.trim()
+    if (!tz) { setCustomError(t('dashboard.timezoneCustomErrorEmpty')); return }
+    if (!isValidTz(tz)) { setCustomError(t('dashboard.timezoneCustomErrorInvalid')); return }
+    if (zones.find(z => z.tz === tz)) { setCustomError(t('dashboard.timezoneCustomErrorDuplicate')); return }
+    const label = customLabel.trim() || tz.split('/').pop()?.replace(/_/g, ' ') || tz
+    setZones([...zones, { label, tz }])
+    setCustomLabel(''); setCustomTz(''); setCustomError(''); setShowAdd(false)
+  }
+
   const addZone = (zone) => {
     if (!zones.find(z => z.tz === zone.tz)) {
       setZones([...zones, zone])
@@ -108,7 +125,29 @@ export default function TimezoneWidget() {
 
       {/* Add zone dropdown */}
       {showAdd && (
-        <div className="mt-2 rounded-xl p-2 max-h-[200px] overflow-auto" style={{ background: 'var(--bg-secondary)' }}>
+        <div className="mt-2 rounded-xl p-2 max-h-[280px] overflow-auto" style={{ background: 'var(--bg-secondary)' }}>
+          {/* Custom timezone */}
+          <div className="px-2 py-2 mb-2 rounded-lg" style={{ background: 'var(--bg-card)' }}>
+            <p className="text-[10px] font-semibold uppercase tracking-wide mb-2" style={{ color: 'var(--text-faint)' }}>{t('dashboard.timezoneCustomTitle')}</p>
+            <div className="space-y-1.5">
+              <input value={customLabel} onChange={e => setCustomLabel(e.target.value)}
+                placeholder={t('dashboard.timezoneCustomLabelPlaceholder')}
+                className="w-full px-2 py-1.5 rounded-lg text-xs outline-none"
+                style={{ background: 'var(--bg-secondary)', color: 'var(--text-primary)', border: '1px solid var(--border-secondary)' }} />
+              <input value={customTz} onChange={e => { setCustomTz(e.target.value); setCustomError('') }}
+                placeholder={t('dashboard.timezoneCustomTzPlaceholder')}
+                className="w-full px-2 py-1.5 rounded-lg text-xs outline-none"
+                style={{ background: 'var(--bg-secondary)', color: 'var(--text-primary)', border: `1px solid ${customError ? '#ef4444' : 'var(--border-secondary)'}` }}
+                onKeyDown={e => { if (e.key === 'Enter') addCustomZone() }} />
+              {customError && <p className="text-[10px]" style={{ color: '#ef4444' }}>{customError}</p>}
+              <button onClick={addCustomZone}
+                className="w-full py-1.5 rounded-lg text-xs font-medium transition-colors"
+                style={{ background: 'var(--text-primary)', color: 'var(--bg-primary)' }}>
+                {t('dashboard.timezoneCustomAdd')}
+              </button>
+            </div>
+          </div>
+          {/* Popular zones */}
           {POPULAR_ZONES.filter(z => !zones.find(existing => existing.tz === z.tz)).map(z => (
             <button key={z.tz} onClick={() => addZone(z)}
               className="w-full flex items-center justify-between px-2 py-1.5 rounded-lg text-xs text-left transition-colors"
diff --git a/client/src/i18n/translations/de.ts b/client/src/i18n/translations/de.ts
index 0421e1ff..82547a92 100644
--- a/client/src/i18n/translations/de.ts
+++ b/client/src/i18n/translations/de.ts
@@ -54,6 +54,13 @@ const de: Record<string, string> = {
   'dashboard.currency': 'Währung',
   'dashboard.timezone': 'Zeitzonen',
   'dashboard.localTime': 'Lokal',
+  'dashboard.timezoneCustomTitle': 'Eigene Zeitzone',
+  'dashboard.timezoneCustomLabelPlaceholder': 'Bezeichnung (optional)',
+  'dashboard.timezoneCustomTzPlaceholder': 'z.B. America/New_York',
+  'dashboard.timezoneCustomAdd': 'Hinzufügen',
+  'dashboard.timezoneCustomErrorEmpty': 'Zeitzone eingeben',
+  'dashboard.timezoneCustomErrorInvalid': 'Ungültige Zeitzone. Format: Europe/Berlin',
+  'dashboard.timezoneCustomErrorDuplicate': 'Bereits hinzugefügt',
   'dashboard.emptyTitle': 'Noch keine Reisen',
   'dashboard.emptyText': 'Erstelle deine erste Reise und beginne mit der Planung von Orten, Tagesabläufen und Packlisten.',
   'dashboard.emptyButton': 'Erste Reise erstellen',
diff --git a/client/src/i18n/translations/en.ts b/client/src/i18n/translations/en.ts
index 33c828ae..db152509 100644
--- a/client/src/i18n/translations/en.ts
+++ b/client/src/i18n/translations/en.ts
@@ -54,6 +54,13 @@ const en: Record<string, string> = {
   'dashboard.currency': 'Currency',
   'dashboard.timezone': 'Timezones',
   'dashboard.localTime': 'Local',
+  'dashboard.timezoneCustomTitle': 'Custom Timezone',
+  'dashboard.timezoneCustomLabelPlaceholder': 'Label (optional)',
+  'dashboard.timezoneCustomTzPlaceholder': 'e.g. America/New_York',
+  'dashboard.timezoneCustomAdd': 'Add',
+  'dashboard.timezoneCustomErrorEmpty': 'Enter a timezone identifier',
+  'dashboard.timezoneCustomErrorInvalid': 'Invalid timezone. Use format like Europe/Berlin',
+  'dashboard.timezoneCustomErrorDuplicate': 'Already added',
   'dashboard.emptyTitle': 'No trips yet',
   'dashboard.emptyText': 'Create your first trip and start planning!',
   'dashboard.emptyButton': 'Create First Trip',
diff --git a/client/src/i18n/translations/es.ts b/client/src/i18n/translations/es.ts
index 132ac0b3..650edc93 100644
--- a/client/src/i18n/translations/es.ts
+++ b/client/src/i18n/translations/es.ts
@@ -55,6 +55,13 @@ const es: Record<string, string> = {
   'dashboard.currency': 'Divisa',
   'dashboard.timezone': 'Zonas horarias',
   'dashboard.localTime': 'Hora local',
+  'dashboard.timezoneCustomTitle': 'Zona horaria personalizada',
+  'dashboard.timezoneCustomLabelPlaceholder': 'Nombre (opcional)',
+  'dashboard.timezoneCustomTzPlaceholder': 'ej. America/New_York',
+  'dashboard.timezoneCustomAdd': 'Añadir',
+  'dashboard.timezoneCustomErrorEmpty': 'Introduce una zona horaria',
+  'dashboard.timezoneCustomErrorInvalid': 'Zona horaria no válida. Usa formato como Europe/Madrid',
+  'dashboard.timezoneCustomErrorDuplicate': 'Ya añadida',
   'dashboard.emptyTitle': 'Aún no hay viajes',
   'dashboard.emptyText': 'Crea tu primer viaje y empieza a planificar',
   'dashboard.emptyButton': 'Crear primer viaje',