Question 1

How do I convert time between two cities?

Accepted Answer

Select your source city and target city using the search boxes or quick-select buttons. The tool instantly shows the current time in both cities with analogue clock faces and digital displays. It automatically adjusts for Daylight Saving Time.

Question 2

What is UTC and how does it differ from GMT?

Accepted Answer

GMT (Greenwich Mean Time) is a historical timezone based on the Royal Observatory in Greenwich, UK. UTC (Coordinated Universal Time) is the modern international time standard maintained by atomic clocks. For practical purposes they are the same. All timezones are expressed as UTC offsets (e.g., UTC+3 is Istanbul, UTC-5 is New York EST).

Question 3

Does this tool account for Daylight Saving Time?

Accepted Answer

Yes, automatically. The tool uses JavaScript's built-in Intl.DateTimeFormat API with IANA timezone database, which includes all historical and future Daylight Saving Time rules for every timezone. No manual adjustment needed.

Question 4

What is the time difference between Istanbul and London?

Accepted Answer

Istanbul is UTC+3 year-round (Turkey does not observe DST). London is UTC+0 in winter (GMT) and UTC+1 in summer (BST). So the difference is 3 hours in winter and 2 hours in summer. When it's 12:00 in London, it's 15:00 in Istanbul (winter) or 14:00 (summer).

Question 5

Can I convert a specific past or future date and time?

Accepted Answer

Yes. Toggle "Custom time" to enter any date and time you want. This is useful for scheduling international meetings (e.g., "what time is 3 PM Tuesday in New York for someone in Tokyo?") or checking historical timezone offsets.

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Conversor de Fuso Horário

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