DateKit
Add Or Subtract Days
Shift any base date by positive or negative day offsets and keep weekday context.
Use Cases
Use positive numbers for deadlines and renewal windows. Use negative numbers for lookback periods and retrospective analysis windows.
The result includes both source and destination weekdays so you can spot weekend landings before publishing schedules.
Inputs are whole days to keep calculations predictable for policy cutoffs and contract dates.
Need exact elapsed time between two moments instead? Open Days Between Dates for signed day/hour/minute totals.
FAQ
Can I subtract days with this calculator?
Yes. Enter a negative number to move backward from the base date.
Does it account for leap years?
Yes. Date math follows the real calendar, including leap years and month-length differences.
Can I use this for recurring schedules?
Yes. It works well for renewal reminders, notice periods, and compliance windows that use fixed-day offsets.