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A date addition calculator adds or subtracts days, weeks, months, or years from a given date to find a resulting date. Useful for calculating deadlines (30 days from today), due dates, warranties (12 months from purchase date), and scheduling. Month addition is ambiguous for months 29–31 days.

Trin-for-trin guide

  1. 1Enter base date and interval
  2. 2Add specified days/months/years
  3. 3Return new date

Løste eksempler

Input
Jan 1, 2026 + 90 days
Resultat
April 1, 2026
Accounts for leap years

Almindelige fejl at undgå

  • Not double-checking results
  • Ignoring edge cases

Ofte stillede spørgsmål

What does this calculator do?

Input values

How do I use this calculator?

System calculates

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