Is today a day off?

A public holiday is a day set by law or government, usually with the day off for most employees. A non-working day is any day you are not expected to work: public holidays, weekends, bank holidays, regional holidays or days given in place of one. Each country page keeps them apart.

Yes. Many countries have days that apply only in some regions (Spanish autonomous communities, German states, Portuguese districts and municipalities, US states, Canadian provinces). Each country page lists them with the regions where they apply, and the larger ones have a page per region.

From the open-source python-holidays project, which follows each country's laws and official calendars, then checked against official government sources for the countries marked as verified. The Sources page shows what was checked, when.

Holidays that follow the Islamic, Jewish or other lunar calendars are confirmed only shortly before, after the moon is sighted or the authority announces them. Until then the date is calculated and can move by a day.