Timestamp Converter
Convert Unix seconds or milliseconds into local, ISO, and UTC time.
Time zone converter and meeting planner
Compare dates and times across up to eight regions, handle daylight saving changes and download a calendar event.
This local time occurs twice when clocks go back. Choose which occurrence you mean.
Compare a 24-hour window
Twelve hours before and after the chosen time. Click a time to use it. Dates are shown because locations may be on different days.
Use IANA names such as Europe/London, not ambiguous abbreviations. Dates: 1900–2100. Up to 8 zones. Rules come from your browser; holidays and working hours are not checked. The ICS file is a single event.
About this tool
Choose a meeting time while checking local dates on both sides of an international time difference.
How to use
Choose the reference time zone and enter the date and time as people in that region would read it. Add regions using IANA names, for example Europe/London and America/New_York. Each card shows the local date, time and UTC offset. Copy the result when arranging a call or checking an overseas event.
For example, 15 January 2026 at 09:00 in New York is 14:00 in London and 23:00 in Tokyo. Summer offsets can differ. The 24-hour comparison window shows twelve hours on either side of your chosen instant; selecting a cell changes the reference time without treating a different local date as the same day.
When clocks move forward, some local times do not exist and must be changed. When clocks go back, the same local time may occur twice: choose the first or second occurrence explicitly. Half-hour and quarter-hour offsets are supported.
Add a title and duration to download a one-off ICS event in UTC for calendar apps. No invitations are sent. Dates are limited to 1900–2100, eight time zones and a duration of 1–1,440 minutes. The browser supplies time zone rules, so keep it up to date. The tool does not check public holidays or working hours, and does not upload or store your event.
Common questions
What happens when daylight saving repeats or skips a time?
Skipped local times are rejected. For repeated times, choose the first or second occurrence explicitly. Time-zone rules come from your browser.
Does the calendar download send meeting invitations?
No. It creates an ICS file containing one event with UTC start and end times. Import it into your calendar yourself; the tool does not send invitations or write to a calendar account.
How do I check a meeting time without confusing the local dates?
Set the source zone to the place whose clock time you are entering, then choose the date and time there. Add the other locations and compare both dates and times. The tool supports eight zones including the source, and 1900–2100; it does not determine working hours or public holidays.
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