Business days and working-hour overlap across regions — local weekends, public holidays, substitute days, mandated makeup workdays, sub-national calendars and DST-correct time zones.
negative counts backwards
shows a 48-hour window from local midnight
The reference zone controls how times are displayed, and which clock the deadline instant is read in. Offsets come from your browser's IANA database, so DST and half-hour zones are always current.
The +n button opens a country's sub-national calendars — provinces, states and Länder with their own holidays and time zones. ~ marks approximate data: lunar or Islamic dates, or statutory rules with real regional nuance.
Format ID: YYYY-MM-DD : label. Omit the ID to apply everywhere; a country ID also covers its regions. Lines starting with # are ignored. Saved in this browser.