Time Zone Converter

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Quick Jump:How It WorksDST gotchasMulti-zone comparisonPopular conversionsExamplesFAQs

How this converter works

You enter a date, a local time, and a source time zone. The calculator interprets that local clock time as an exact instant using the IANA time zone rules (including DST), then converts the instant into the target time zone.

DST gotchas: ambiguous and non-existent times

During daylight saving changes, some local times can occur twice (fall back) or not exist at all (spring forward). This converter detects those cases and will prompt you to pick the correct occurrence or use a suggested valid time.

Compare multiple time zones in one view

Need to coordinate across regions? Add up to five target zones to compare times side by side. The results table highlights date shifts (previous/next day), and the Time Explorer slider lets you test different times quickly. This is ideal for scheduling global meetings or checking overlap windows.

Popular time zone conversions (long-tail queries)

UTC to EST / PST

Convert UTC to US Eastern or Pacific with DST-aware offsets.

IST to PST / EST

Common for India ↔ US meetings and late-night overlaps.

Tokyo to London

Find a time that avoids date shifts for global teams.

Sydney to New York

Compare day changes across the International Date Line.

Examples

IST → UTC

Asia/Kolkata 09:00 becomes 03:30 UTC (same date)

India → US Pacific

A morning time in India can be previous-day evening in California

Frequently Asked Questions

Does this handle daylight saving time (DST)?▼
Yes. The converter uses IANA time zone rules and detects DST transitions. If a local time is ambiguous (occurs twice) or non-existent (skipped), the tool will warn you and guide you to a valid selection.
Why does the converted date sometimes change?▼
Time zones can be many hours apart. When you convert an exact moment between zones, it can land on the previous or next calendar date in the target zone (for example, India → US Pacific).
What’s the difference between UTC offset and time zone?▼
A UTC offset is just the current difference from UTC (like UTC+05:30). A time zone (like Asia/Kolkata or America/New_York) includes historical and DST rules, so offsets can change by date.