ISO week 51 runs from December 20, 2027 through December 26, 2027. Every day is shown with available holidays, school breaks, Moon phases and solar information.
Calendar guide
This weekly calendar follows ISO 8601 and therefore begins on Monday. The seven-day layout keeps working days and the weekend in one sequence, which helps with shift planning, appointments, travel and family coordination.
An ISO week can overlap two months or even two calendar years. The week-year and week number, not the month containing most days, determine the URL and heading. This keeps week references stable in international schedules.
The week contains at least one stored public holiday, school-holiday period or primary Moon phase. Public and school holidays remain separate and regional scope is displayed where available.
A holiday on Monday or Friday can extend a weekend, while a Tuesday or Thursday can make a bridge day relevant. Whether a person is actually free depends on the applicable region and individual working schedule.
Daily sunrise, sunset and daylight values refer to the named reference location. Showing all seven days makes the gradual seasonal change visible without implying that the values apply to every place in Germany.
Solar values support ordinary planning but do not account for a local horizon, buildings, elevation or weather. Binding deadlines should be verified independently.
FAQ