Instructions
Date difference calculator
How to use
Choose both dates and whether to include the starting day.
Choose both dates and whether to include the starting day.
Supported input
UTC calendar-day calculation avoids timezone and daylight-saving offsets.
Input example
2026-10-13 → 2026-10-20
Result example
7 days; 8 days when including the first day
Troubleshooting
Check required inputs, numeric ranges and the selected conversion direction. Choose both dates and whether to include the starting day.
Limitations
UTC calendar-day calculation avoids timezone and daylight-saving offsets.
How it works
Count calendar days between two dates. UTC calendar-day calculation avoids timezone and daylight-saving offsets.
Units & precision
UTC calendar-day calculation avoids timezone and daylight-saving offsets.