Question 1

What is a Unix timestamp?

Accepted Answer

A Unix timestamp (or Epoch time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC. It's a standard way to represent time in computing.

Question 2

What's the difference between seconds and milliseconds?

Accepted Answer

Unix timestamps in seconds have 10 digits (e.g., 1704067200), while milliseconds have 13 digits (e.g., 1704067200000). JavaScript uses milliseconds, while most Unix systems use seconds.

Question 3

How do I know if my timestamp is in seconds or milliseconds?

Accepted Answer

Count the digits. 10 digits = seconds, 13 digits = milliseconds. Current timestamps in seconds start with 17..., milliseconds start with 170...

Question 4

What is the Year 2038 problem?

Accepted Answer

32-bit systems store Unix timestamps as signed 32-bit integers, which will overflow on January 19, 2038. Modern 64-bit systems use 64-bit integers, solving this issue.

Question 5

Does this handle timezones?

Accepted Answer

Yes! The converter shows both UTC and your local timezone. Unix timestamps are always UTC-based, so they're timezone-independent.

Timestamp Converter

Timestamp → Date

Date → Timestamp

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