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timezone converter

Timezone Converter. Convert Date & Time Between Two Zones

Pick a source zone, type the wall-clock time there, and read the same instant in the target zone. No Unix arithmetic, no UTC detour in your head, the browser does the moment math.

converter

Convert a time between two zones.

Pick the source zone, type a wall-clock time, and read the same instant in the target zone — no epoch arithmetic required. DST is handled per-moment.

from · local time
to · utc

How it works

Every line you type is first resolved to an exact instant using the source zone's rules, then re-rendered in the target zone. The two "offset" rows show you the UTC± for both zones at that specific moment, which is the key detail: offsets are not fixed, they change with daylight saving, so "New York is UTC−5" is only true half the year.

The Local option is your browser's own timezone (whatever Intl reports), and every other entry is a full IANA zone, all 400+ of them, searchable by name in the dropdowns. Both pickers are the same accessible combobox pattern the main converter uses: type to filter, arrow keys to move, Enter to select.

Worked examples

  • 2026-08-07 14:30:22 from Asia/Kolkata to America/New_York → 05:00:22 the same day (UTC+5:30 → UTC−4 in August).
  • 2026-01-15 09:00:00 from Europe/London to Asia/Tokyo → 18:00:00 (UTC+0 in winter → UTC+9).
  • Picking Local on both sides is a no-op sanity check, and a quick way to learn your browser's offset at any date.

Daylight saving, handled per moment

Because the conversion is done against the IANA database embedded in your browser (Intl.DateTimeFormat with a zone), spring-forward and fall-back are applied for the exact date you enter, a July value gets the summer offset, a January value the winter one, even for the same pair of zones. Two edge cases exist but are rare: an hour that doesn't exist (skipped at spring-forward) and an hour that happens twice (fall-back). The converter resolves both to the nearest valid interpretation.

Related tools

This is the timezone sibling of the epoch tools: the timestamp-to-date converter renders one epoch in any zone, and the date-to-epoch converter goes the other way. The main epoch converter also carries the same zone picker on its output.

First published · Last reviewed · Maintained and developed by the Real Epoch Converter team · [email protected] · Contact · Methodology

Sources & references

More timestamp tools

Need the plain Unix timestamp instead of this format? The epoch time converter on the home page converts dates to Unix timestamps and back — seconds, milliseconds, or microseconds — with batch conversion, and the Unix timestamp to date converter handles one value at a time.

Prefer reading? The guides explain Unix time, timestamp formats, and common bugs in depth, and the methodology page documents exactly how this site handles negative timestamps, fractional seconds, leap seconds, and daylight-saving transitions.

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