Date Calculator
Find the date that is any number of days, weeks, months or years before or after a given date — ideal for deadlines, notice periods, project milestones and due dates.
Check your input
Please enter a valid start date.Formula
Result = start date ± n days / weeks / months / years
Example
Input
1 January 2026 + 30 days
Result
31 January 2026
Frequently asked questions
Yes. February always has the correct number of days for the year in question.
You get 28 February (or 29 in a leap year), because the calculator clamps to the last valid day of the target month.
Yes — use the Business Days Calculator, which excludes weekends and public holidays you specify.
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