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Timestamp and Timezone Converter

Convert dates with explicit epoch units and timezone rules.

This calculator runs in your browser. Nothing is sent to a server.

Epoch or ISO-8601

Integer epoch in the selected unit, or a strict ISO-8601 timestamp. Locale is not guessed.

Epoch unit

Timezone

Primary output

DST ambiguity

Clock

How it works

Processing stays in this browser tab. Source files are not uploaded. Export is a new copy; originals are not overwritten.