NumSmith

Date difference & countdown

Days between two dates, countdown to a date, and years/months/days breakdown.

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For reference only

Results use standard formulas and published rates. Actual figures may differ due to personal deductions, institution rules and rounding. Do not rely on this alone for legal or financial decisions.

When to use this

Days until a deadline, days since an event, or the exact span between two dates in years, months and days. Leave one side as today for a countdown.

How to use it

  1. Enter start and end dates.
  2. Read the total days, weeks and the year/month/day breakdown.

Frequently asked questions

Is the start day included?
The start day counts as day 0. Add 1 if you want inclusive counting.

When people use this

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