About the Date Calculator (Add or Subtract Days)
Find the date a given number of days, weeks, months or years before or after another date — for deadlines, due dates, notice periods, warranties and visas.
How does the Date Calculator (Add or Subtract Days) work?
Months and years are added first, then weeks and days. When a month is shorter than the starting day (adding a month to 31 January), the result is the last day of that month.