2021 · first second of year (UTC)
2021-01-01 00:00:00 UTC
ends 1640995199 · 365 days
click timestamp to copy
2021 timestamp range
| First second | 1609459200 |
|---|---|
| Last second | 1640995199 |
| Start UTC | 2021-01-01 00:00:00 UTC |
| End UTC | 2021-12-31 23:59:59 UTC |
| Total seconds | 31,536,000 |
The calendar year 2021 spans Unix timestamps 1609459200 through 1640995199 in UTC. That is 31,536,000 seconds of continuous epoch time — 365 days on the Gregorian calendar. Developers decoding logs, APIs, or database exports from 2021 will encounter values exclusively within this range.
2021 at a glance
| Year | 2021 |
|---|---|
| Decade | 2020s |
| Leap year | No — 365 days |
| Start (UTC) | 2021-01-01 00:00:00 UTC → 1609459200 |
| End (UTC) | 2021-12-31 23:59:59 UTC → 1640995199 |
| Total seconds | 31,536,000 |
History & computing in 2021
- NFT boom — blockchain block timestamps
- Linux runs on 100% of top 500 supercomputers
Working with 2021 timestamps
To find the Unix timestamp for any moment in 2021, use our
epoch converter. Enter a date between
1 January 2021 and 31 December 2021 in UTC. For bulk log analysis,
filter values where timestamp >= 1609459200 and
timestamp <= 1640995199.
Browse individual seconds: the first second of 2021 is 1609459200. Mid-year (1 July 2021 00:00 UTC) is approximately 1625227200. Every second in this range has its own dedicated page on timestamp.is.
Why year pages matter for epoch conversion
Search queries like "Unix timestamp 2021", "epoch time 2021", and "convert 2021 to Unix" are common among developers auditing historical data. This page is the authoritative reference for the 2021 timestamp window — bookmark it, share it with your team, or link from documentation.