Date Difference Calculator
Count the time between any two dates: total days, weeks and days, and years, months and days. Use it for deadlines, contracts, notice periods, pregnancies, trips or counting down to an event.
Days between two dates
How the difference is counted
Total days
Days = end date − start dateBy default the start date is counted and the end date isn’t, like counting nights in a hotel. Choose “include the end date” when both days count, such as a leave period from Monday to Friday (5 days, not 4).
Years, months and days
Whole months are counted first, then the remaining daysFrom 31 January, one month later is taken as the last day of February, so leap years and short months are handled correctly.
Worked examples
- 52 days = 7 weeks and 3 days = 1 month and 22 days
- Difference = 4 days; including the end date = 5 days
Days in each month
| Month | Days | Month | Days |
|---|---|---|---|
| January | 31 | July | 31 |
| February | 28 (29 in leap years) | August | 31 |
| March | 31 | September | 30 |
| April | 30 | October | 31 |
| May | 31 | November | 30 |
| June | 30 | December | 31 |
A year is a leap year if it divides by 4, except century years, which must divide by 400. 2024 and 2028 are leap years; 2100 is not.
Frequently asked questions
How many days are there between two dates?
Enter both dates above. For example, 1 January to 31 December in a normal year is 364 days, or 365 including the end date.
Should I include the end date?
Include it when both the first and last day count, such as holidays or project days. Leave it out for durations like ages or hotel nights.
Can I count only working days?
Yes, use the Working Days Calculator, which skips weekends and holidays.