21 Days Ago
What date is 21 days before today? The answer below was computed when this page was built; the live answer changes daily, so use the formula or the worked examples for any date you choose.
As of build time (April 27, 2026)
Monday, April 6, 2026
Unix timestamp: 1775433600 · ISO 8601: 2026-04-06T00:00:00Z
Worked Examples From Reference Dates
| Start Date | 21 days before | Unix Timestamp |
|---|---|---|
| January 1, 2024 | Monday, December 11, 2023 | 1702252800 |
| July 4, 2024 | Thursday, June 13, 2024 | 1718236800 |
| January 1, 2025 | Wednesday, December 11, 2024 | 1733875200 |
| June 15, 2025 | Sunday, May 25, 2025 | 1748131200 |
| January 1, 2026 | Thursday, December 11, 2025 | 1765411200 |
How to Calculate This Yourself
JavaScript (with day.js)
dayjs().subtract(21, 'day').format('YYYY-MM-DD')
Python
from datetime import date, timedelta result = date.today() - timedelta(days=21)
Bash (GNU date)
date -d "-21 days" +"%Y-%m-%d"