About this site

What we publish

Exact dates for US federal holidays, state holidays and popular observances, each with the rule that determines the date rather than just a number to copy.

How dates are verified

Federal holiday dates come from the statutory list in 5 U.S.C. § 6103 and the Office of Personnel Management's published schedule. Observances that are set by weekday rather than by date — Thanksgiving, Mother's Day, Memorial Day, Arbor Day — are calculated from those rules and cross-checked against official sources.

Every page carries the date it was last verified against those sources.

Corrections

If you find a date that is wrong, tell us and we will fix it. Accuracy matters more here than speed.

Last updated September 26, 2026.