Countdowns to 48 holidays, and the rule behind each date
Every entry below is a live countdown: days remaining, weeks and days, working days remaining, the exact date and the weekday it falls on. What makes these worth opening rather than glancing at a snippet is the second half of each page — how the date is decided.
Some are fixed: Christmas is always 25 December, so only the weekday moves. Some are floating: Thanksgiving is the fourth Thursday in November — fourth, not last, which differs in years with five Thursdays. Some are computed: Easter is the first Sunday after the first ecclesiastical full moon falling on or after 21 March, which puts it between 22 March and 25 April, and every date that hangs off it moves with it. And some cannot be stated as certain at all: Ramadan and Eid depend on a local moon sighting, so any date published in advance is an estimate and those pages say so instead of printing a number with a straight face.
Federal holidays and observances are not the same thing
Only eleven of these close federal offices, and only those eleven are skipped by the business-day calculators here. Valentine's Day, Halloween and Black Friday are observances: the shops are busy, the offices are open, and the day still counts as a working day. Each page says which kind it is looking at, and where a weekend date shifts the federal observance to an adjacent weekday, it says which day that is.
Dates and sources: where our holiday dates come from.