How the Converter Works
Enter a date and time in your source time zone, then select the target time zone. The converter uses the browser's Intl.DateTimeFormat API to display that moment in the target zone with correct DST handling.
Choosing Your Time Zone
Time zones are listed alphabetically by IANA identifier. For Houston, select America/Chicago (Central Time). For London, select Europe/London.
Frequently Asked Questions
This converter uses the Intl.DateTimeFormat API built into your browser, which applies the correct DST offset for the chosen time zone and the specific date entered. You do not need to add or subtract an hour manually.
Time zones are listed using IANA time zone identifiers (the tz database), for example America/New_York or Europe/London. These correspond to cities or regions rather than fixed UTC offsets.
UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. It is effectively the same as GMT and does not observe daylight saving time.
A UTC offset is a fixed number of hours ahead or behind UTC. A time zone is a named region that may have a different offset in summer (DST) versus winter.
Most time zones are offset by whole hours, but a few are not. India is UTC+5:30, Nepal is UTC+5:45, and parts of Australia use UTC+9:30. These reflect historical political or geographic decisions.
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