2021 Unix Timestamps

Unix timestamps for the start of each month in 2021. January 1, 2021 00:00:00 UTC = 1609459200.

2021 year boundaries

Start of 2021: 1609459200 (January 1, 2021 00:00:00 UTC). Start of 2022 (exclusive year-end boundary): 1640995200. 2021 is a common year with 365 days.