# Timestamps

Unix time counts the seconds since 00:00:00 UTC on 1 January 1970, so the timestamp 86400 marks the start of 2 January 1970. Other machine-readable formats include millisecond timestamps, ISO 8601 and RFC 3339 strings and spreadsheet date serial numbers, each of which can be converted to UTC or local time.

## Tools

- Unix Timestamp Converter (Coming soon): Convert Unix epoch time in seconds or milliseconds to a readable date in UTC or local time, and back.

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Category: [Time & Date Tools](https://techolm.com/date-time-tools)