Time and Date - Add, Subtract

Add or subtract days, hours, minutes or seconds to a certain time and date. Enter date and time, as well as the time that should be added or subtracted. Choose the according arithmetic operator. The new date and time will be calculated. The different lengths of the months as well as leap years are taken into account. Current date and time (CET) are preset.

Example: if it is 13 o'clock noon now, then one day and 14 hours ago it was 23 o'clock two days previous (- days: 1 hours: 14).