Days Between Dates
Plan a leave period, event or project span. Count calendar days and Monday–Friday weekdays, choose whether to count both dates, and supply observed holidays to calculate business days.
Exclude holidays from business days
Business days assume Monday–Friday. Add dates observed in your region or workplace; no holiday calendar is loaded automatically.
After editing dates, select Count Days again. Duplicates, weekend holidays and dates outside the range do not reduce the count twice.
From January 1, 2026 to December 31, 2026 is 364 days (the start date is not counted).
- Weeks
- 52
- Weekdays (Mon–Fri)
- 260
- Business days (holidays excluded)
- 260
- Weekend days
- 104
Calculated in your browser using calendar dates, so time zones and daylight saving time don’t affect the result.
How Days Are Counted
By default the calculator counts the number of days you move forward from the start date to reach the end date. The start date itself isn’t counted, so Monday to Tuesday is 1 day — the same way you would count nights in a hotel.
Tick “Include end date” to count both the start and end dates. Monday to Tuesday then becomes 2 days, which is useful for event durations or leave requests.
- 1March 1 → March 31 = 30 days
- 2Including the end date: 30 + 1 = 31 days
Therefore: March 1 to March 31 is 30 days, or 31 days counting both dates.
Weekdays vs Calendar Days
Weekdays are Monday to Friday. The weekday total skips Saturdays and Sundays. The separate business-day total also excludes the observed holiday dates you enter; it does not choose a national holiday calendar for you.
| September 21–28, 2026 | Calendar days | Weekdays | With September 25 excluded |
|---|---|---|---|
| Start excluded (default) | 7 | 5 | 4 business days |
| Both dates counted | 8 | 6 | 5 business days |
When Is a Days Between Dates Calculator Useful?
- Counting down to an event
- Trip and vacation length
- Working days for a project
- Deadlines and notice periods
- Pregnancy and baby milestones
- Billing and payment periods
Frequently Asked Questions
Subtract the start date from the end date. For example, from January 1 to March 1, 2026 is 59 days because January has 31 days and February 2026 has 28.
Include it when both days count, such as a 3-day event from Friday to Sunday. Leave it off for elapsed time, such as nights stayed or days until a deadline.
The weekday total excludes only Saturdays and Sundays. Expand the holiday option and enter your observed holiday dates to get a separate business-day total. Duplicate holidays, weekends and dates outside the span are ignored.
No. The result is always the absolute number of days between the two dates.