CodeCraft

Date Calculator

Calculate the interval between two dates, or add/subtract days from a date

How to Use

  1. Switch between "Date Interval" and "Date Offset" tabs depending on what you need.
  2. Date Interval: pick a start and end date to get the day count, inclusive day count, weeks/days breakdown, and weekday count.
  3. Date Offset: pick a base date, enter a number of days, and choose Before/After to get the resulting date and its weekday.
  4. All calculations run locally in your browser; no dates are sent anywhere.

About Date Calculator

This tool helps you quickly compute the interval between two calendar dates, or find a date that is N days before/after a given date. Common uses include counting days until a deadline, calculating age in days, figuring out contract or rental durations, or planning a date N days from today. All computation happens locally using JavaScript's Date object — no data is uploaded.

Frequently Asked Questions

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