Compare times across cities. Add as many as you need.
Time zones are regional offsets from UTC (Coordinated Universal Time). Each zone has a canonical IANA identifier like America/New_York or Asia/Tokyo, and these identifiers — not abbreviations like EST or PST — are what software uses to handle history, future dates, and daylight saving time correctly.
Daylight saving time makes conversions tricky. Most US zones shift between EST (UTC-5) and EDT (UTC-4) on different dates than European zones. Some countries (Japan, India, most of Africa) never observe DST. A few zones have offsets that aren't whole hours — India is UTC+5:30, Nepal is UTC+5:45. This converter uses the browser's built-in Intl API, which is backed by the IANA tz database and handles DST automatically for any date you pick.
When scheduling across zones, the safest approach is to pick a specific date and time and let the tool compute each party's local time. Common overlap windows for US-Europe meetings: 8-11am Pacific = 5-8pm Central European. For US-Asia: the overlap is narrow — late evening on one side, early morning on the other.
This tool in other languages:
Français:
Convertisseur de fuseau horaire
Español:
Convertidor de zona horaria
Deutsch:
Zeitzonen-Konverter
Português:
Conversor de fuso horário
日本語:
タイムゾーン変換ツール
中文:
时区转换器
한국어:
시간대 변환기
العربية:
محول المنطقة الزمنية
Set your source time and timezone, then add destination cities. The converted time appears for each one instantly. Click Use current time to start from now, or pick a specific time for meeting planning. All conversions happen in your browser.
Add every participant's city. The tool shows the meeting time in each zone side by side — you can spot at a glance whether 9 AM EST works for your Berlin and Tokyo colleagues (it's 3 PM in Berlin but midnight in Tokyo, so probably not). Adjust until you find a window where everyone is in working hours.
Yes. The tool uses the browser's IANA timezone database, which tracks DST rules for every region. If you're converting between a zone that observes DST and one that doesn't (e.g. Eastern Time to Arizona), the offset changes depending on the date — the converter accounts for this automatically.
UTC (Coordinated Universal Time) is the global time standard — the reference against which other zones are defined. GMT (Greenwich Mean Time) is usually the same as UTC in practice but technically a timezone, not a standard. Your local time is UTC plus or minus your zone's offset, adjusted for DST when applicable.
Because timezones cover a 26-hour spread globally (from UTC-12 to UTC+14). When it's Monday 10 PM in Los Angeles, it's already Tuesday 3 PM in Sydney — the next calendar day. For regular cross-Pacific meetings, stating both dates ("Mon Apr 14 / Tue Apr 15 morning AEST") prevents confusion.