Days between dates calculator

How to use the tool

Choose the start or end date, then select a day. Use the arrow keys or drag a highlighted date. Include the end date to count that day.

1. Fill in these fields: Start date, End date, Include the end date.
2. Select “Calculate” to obtain the result.
3. Choose the start and end dates.
4. The default difference excludes the end date; enable the option to count both endpoints.

Method, examples and limits

Dates are calculated in UTC without daylight-saving effects. January 1 to January 2 gives 1 day, or 2 with both endpoints included. Identical dates give 0 or 1 respectively. Leap years are included. Displayed hours equal days × 24; they are not elapsed hours between local timestamps.

Result details

Limits and checks

• Only when you enable the option. Identical dates give 0 days, or 1 with the end date included.