View current times across multiple timezones and convert between them instantly.
Search and add cities or time zones to your clock display.
See the live current time in all added time zones.
Quickly compare times across multiple locations at a glance.
Pick a handful of cities or UTC offsets and this displays what time it is right now in each one, updating live, or lets you enter a specific date and time in one zone to see the equivalent moment in the others. It resolves each zone's current offset from a standard timezone database, so daylight saving is applied automatically for whichever zone observes it. The most common surprise: a conversion near midnight can shift the result onto the previous or next calendar date, not just a different hour, so the date shown next to each time matters as much as the clock face.
A concrete input and expected output from the current implementation.
Input
Convert 3:00 PM in New York on August 16, 2026 to London and Tokyo time.
Expected output
London: 8:00 PM, August 16, 2026 (BST, UTC+1). Tokyo: 4:00 AM, August 17, 2026 (JST, UTC+9).
On that date New York is on Eastern Daylight Time (UTC-4) and London is on British Summer Time (UTC+1), so 3:00 PM EDT is 7:00 PM UTC, which is 8:00 PM in London and, at UTC+9 with no DST in Japan, 4:00 AM the following calendar day in Tokyo.
Each zone is matched to its current UTC offset using a standard timezone database that encodes daylight saving start and end dates by region. Because DST rules differ by country and can change in some years, the same named zone can sit at a different offset depending on the date entered, not a fixed number of hours from UTC.
A conversion works by first expressing the entered time in UTC using the source zone's offset for that date, then reapplying the target zone's offset for that same instant. When the offset difference crosses midnight, the calendar date in the result advances or rolls back accordingly rather than staying fixed to the input date.
Yes, for whatever date is entered - it applies the DST rule in effect for that zone on that specific date, not just today's rule. This matters when converting a time months out, since a zone's offset relative to another can shift between now and then as one or both change clocks.
Zones on opposite sides of the International Date Line, or far enough apart in offset, can be a full calendar day apart even when the hour looks similar. That's expected, not a bug - check the date shown next to each city's time, not just the hour and minute.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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