Time Zone Converter

What is the Time Zone Converter?

The Time Zone Converter takes a date and time in one city or country and shows the same moment in others, with daylight saving applied correctly for the date you chose rather than today’s offset. Compare several zones side by side, see the day change when a meeting crosses midnight, and copy the result for an invite. It uses your browser’s built-in time zone database, which is kept current by your operating system, so it stays right when a country changes its rules.

How to use it

1. Pick the source city or zone and enter the date and time.
2. Add one or more target cities.
3. Read the converted times, each with its date and current UTC offset.
4. Adjust the source time to find a slot that works for everyone.

The daylight saving trap

Most mistakes come from using a fixed offset (“New York is UTC minus 5”) when the offset changes twice a year, on dates that differ by country. The US and Europe shift on different weekends in March and October or November, so for two or three weeks a year the gap between London and New York is four hours rather than five. Some places (Arizona, Queensland, most of Asia and Africa) do not observe DST at all. The converter avoids this by working from the actual date. Why calculators disagree, how to write times in emails so nobody gets it wrong, and the countries with unusual offsets are in how to convert time zones without getting it wrong.

Tips for scheduling

• Write the time with the zone name and the city, not just an abbreviation; CST means three different zones.
• State the date on both sides when a call crosses midnight.
• Send calendar invites; the recipient’s client converts automatically.
• For recurring meetings, expect the time to shift for one side when DST changes.

Related tools

Convert other units with the Unit Converter, calculate the exact time between two dates with the Age Calculator, and convert speeds with the Speed Converter.

Frequently asked questions

Is daylight saving handled automatically?

Yes, for the date you enter, using the IANA time zone rules in your browser.

Can I convert a future date?

Yes. Rules for future years follow the current law; if a country changes its rules, your system update will reflect it.

Why does the result show a different date?

Because the moment falls on the previous or next day in the target zone. The date is shown for exactly that reason.