Holidays
All 11 US federal holidays for any year, calculated live from the actual rules — not copied from a static list — including which date federal offices actually observe when a holiday falls on a weekend.
When a federal holiday falls on a Saturday, it's officially observed the preceding Friday; when it falls on a Sunday, it's observed the following Monday. This affects when federal offices, courts, and banks are actually closed, even though the legal holiday date itself doesn't move — this calculator shows both.
This covers the 11 holidays established in federal law for federal employees and the federal calendar. Many states and private employers observe additional holidays, and not every federal holiday is a mandatory closure for private businesses — check with a specific employer or state government for their own calendar.
Related
The exact logic (2nd Monday, 4th Thursday) behind most of these dates.
The equivalent list for the United Kingdom.
Count working days, optionally excluding these holidays.