Time Zone Converter

Convert a time between cities and time zones, with daylight saving applied, and find meeting hours that suit everyone.

Converts a date and time between cities and time zones, with daylight saving time applied, and lines the places up hour by hour to show when everyone is within working hours — for calls, flights and deadlines across time zones.

Using the converter

Search for a place by city, by time zone such as Europe/London, or by abbreviation such as IST or EST. An abbreviation that names several zones offers each: IST is India, Ireland in summer and Israel. Set the date and time in the place chosen under “In”, which leads the list, and every other place follows; add up to ten places. City names come from GeoNames (geonames.org), under the CC BY 4.0 licence.

The strip beside them lines up the same 24 hours in every place, starting at midnight in the first; choose an hour to set the time to it. Hours within the working hours you set are shaded (UTC is a reference rather than a place, so it has none), and a green mark above an hour shows that everyone is at work then. When no hour suits everyone but two or more places share some, a grey mark shows the closest hours, those with the most places at work, and the converter names the two longest runs and which places are away in each. Without a link the converter follows the current time; once you change anything, the link holds the places, the time, the clock format and the working hours, so it shows the same plan to whoever opens it.

Offsets, zones and daylight saving

A UTC offset such as UTC+5:30 is a fixed difference from UTC. A time zone is a place's rules over time: which offset it uses on which dates, including daylight saving changes and past changes of law. The converter uses zones from the IANA time zone database built into your browser, so a date in summer gets the summer offset. A browser updated before a very recent change of rules may still apply the old ones.

When clocks go forward, an hour of local time does not happen; a time in it is shown as the time after the change, and the converter says so. When clocks go back, an hour happens twice; the earlier one is used, with a button for the later.

Abbreviations are shorthand, not standards: CST is Central Standard Time in the US and China Standard Time, and BST is British Summer Time and Bangladesh Standard Time. They are shown where one is in common use, with the UTC offset beside them.

Examples

India and New York across the US clock change

09:00 in India on 5 March 2026 is 22:30 EST on Wednesday in New York, 10 hours and 30 minutes behind. A week later, after the US moves its clocks forward on 8 March, 09:00 in India is 23:30 EDT: 9 hours and 30 minutes. India does not change its clocks, so every meeting shifts by an hour on the Indian side.

London and New York in March

The US changes its clocks three weeks before the UK, so on 16 March 2026 09:00 in New York is 13:00 GMT in London: 4 hours apart instead of the usual five.

UTC offsets in 2026

Mid-January and mid-July 2026, with daylight saving time applied

Place	January	July
Los Angeles	PST, UTC-8	PDT, UTC-7
New York	EST, UTC-5	EDT, UTC-4
São Paulo	BRT, UTC-3	BRT, UTC-3
London	GMT, UTC+0	BST, UTC+1
Berlin, Paris	CET, UTC+1	CEST, UTC+2
Moscow	MSK, UTC+3	MSK, UTC+3
Dubai	GST, UTC+4	GST, UTC+4
India	IST, UTC+5:30	IST, UTC+5:30
Singapore	SGT, UTC+8	SGT, UTC+8
Tokyo	JST, UTC+9	JST, UTC+9
Sydney	AEDT, UTC+11	AEST, UTC+10

Frequently asked questions

No. India Standard Time is UTC+5:30 all year, as the table shows for January and July, so the difference to places that change their clocks moves by an hour twice a year.

On the clock, yes: both are UTC+0. UTC is the time standard the world's clocks are set by; GMT is the name of the UK's winter time. In summer London is on BST, UTC+1, so “GMT” for London in July is an hour off.