What this tool does
Converts a date/time to multiple time zones simultaneously. Handles DST automatically using the IANA timezone database.
Converter and calculator
Time Zone Converter
Convert times between any two time zones. Shows the local time in multiple cities simultaneously. Accounts for DST automatically.
Complete guide
How to use Time Zone Converter
Date/time guide for time zone converter users.
Scheduling across time zones is a constant challenge for remote teams and international meetings. This tool converts a time in one zone to all selected zones simultaneously, accounting for daylight saving time (DST) transitions automatically.
All conversion is calculated from UTC offsets. DST is handled using the IANA timezone database — the same one used by operating systems.
How to use it
Select a date and time. Choose the source timezone. Add target timezones. All conversions update instantly.
DST note
Daylight saving time changes automatically based on the selected date. A time in June may differ from the same hour in December for zones that observe DST.
Quick checklist
- Always include a date — DST changes the offset between dates.
- For meeting scheduling, convert to participants' local zones before sending invites.
- UTC has no DST — use it as a stable reference.
- India (IST) is UTC+5:30 — 30-minute offset, not a whole hour.
Answers
Time Zone Converter FAQs
Does this automatically handle daylight saving time?
Yes. The IANA timezone database is used, which includes all historical and future DST rules for every timezone.
What is UTC?
Coordinated Universal Time — the global time standard with no DST offset. All other timezones are expressed as UTC+ or UTC−.
Why do some timezones have 30-minute or 45-minute offsets?
Some countries set their offset to half or three-quarter hours for political or geographical reasons. Examples: India (UTC+5:30), Iran (UTC+3:30), Nepal (UTC+5:45).
How do I find my current timezone?
The converter detects your browser's local timezone automatically and pre-fills it as the source zone.