Time zones
Time Zone Converter
Convert a date and time between IANA timezones, or inspect the UTC offset at a chosen instant, with daylight saving applied by your browser.
Zones and times stay in this tab. Rosters are not uploaded.
How zones are handled
Pick a source date and time plus IANA zones to answer “what time is it there?”, or switch to UTC offset mode to read the offset and abbreviation for any zone at an absolute instant. Offsets come from the browser Intl API for that moment, not from hard-coded tables, so daylight saving is applied automatically. Always convert with a real date: July and January often disagree for the same cities. Use Meeting Time Finder when you need shared daytime slots across several zones, or Team Time Zone Planner when each person has different working hours.
How to use it
Choose convert mode or UTC offset mode. Enter a real calendar date, a clock time, and IANA zones (for example Europe/Zagreb and America/New_York). Read the local equivalent or offset label, then paste it into chat or the invite. If you need overlap across several people, switch to Meeting Time Finder or Team Time Zone Planner instead of converting one pair at a time.
Assumptions
Offsets come from your browser’s IANA data for the exact date and time you enter. Fixed “UTC+1” labels are not used. The tool converts one instant at a time; it does not invent a meeting series.
Worked example
Scenario
2026-07-01 09:00 Europe/Zagreb → America/New_York
Output
03:00 America/New_York (EDT, UTC−4)
Quick comparison
| Option | Detail |
|---|---|
| Convert mode | Map one date/time from a source zone to a target zone. |
| UTC offset mode | Show offset and abbreviation for a zone at an absolute instant. |
| Meeting Time Finder | Use when several zones need shared daytime candidates. |
| Team Time Zone Planner | Use when each person has different working hours. |
More coordination scenarios
- 2026-07-01 09:00 Europe/Zagreb → America/New_York (EDT summer offset).
- 2026-01-15 09:00 Europe/London → check GMT vs BST on that January morning.
- Confirm a release timestamp in UTC offset mode before you ping a remote team.
Practical use cases
- Someone in chat wrote “9am” without a zone and you need the equivalent before you reply.
- You are confirming a launch timestamp across regions before a release.
- You are explaining why London’s offset changed between January and July.
- A client in another country proposed a clock time and you need your local equivalent.
- You want the UTC offset label for a zone at a specific instant before writing a runbook.
Limitations
Does not create calendar events. Does not resolve ambiguous local times during DST fall-back without you picking the intended instant. City names that are not IANA IDs will not work. Browser timezone data can lag rare rule changes.
Timezone questions
- Why does July disagree with January for the same cities?
- Daylight saving rules differ by region. Always convert with a real date, not a bare clock time.
- What is an IANA timezone?
- A named zone like Europe/Zagreb or America/New_York that carries historical DST rules. Prefer these over fixed UTC+1 labels when seasons matter.
- Does this book the meeting for me?
- No. It converts one instant. Use Meeting Time Finder or Team Time Zone Planner when you need overlap candidates.
- When should I use UTC offset mode?
- When you need the offset and abbreviation for a zone at a chosen instant, not a full city-to-city conversion.
Timezone math uses your browser’s IANA data for the chosen instant. How our tools work · Editorial policy · Contact