Find out exactly how many days remain until a future date, or how many days have passed since a past date.
This tool counts the exact number of days between two dates, or counts forward/backward a set number of days from a given date. It's useful for tracking deadlines, project timelines, countdowns to events, billing cycles, or figuring out how many days until or since a specific date.
The calculator counts calendar days between two dates, automatically accounting for varying month lengths and leap years. Depending on the mode, it can include or exclude the start and end dates.
Enter a start date and an end date to see the number of days between them, or enter a start date and a number of days to add or subtract to find a resulting date.
Example 1: From January 1 to March 1 (non-leap year) is 59 days.
Example 2: 100 days after June 1 falls on September 9.
Does this account for leap years automatically? Yes, the calculator adjusts automatically for leap years when counting across February in a leap year.
Are the start and end dates both counted? This depends on the counting method selected — some contexts (like contract terms) count inclusively, others exclude the start date; check the specific mode used.
Can I count business days only? Some day counters offer a business-days-only mode that excludes weekends; check the tool's specific options for this feature.
Why would I need to count days between dates? Common uses include calculating age, tracking project deadlines, measuring subscription or billing periods, and planning events or travel.
Can I calculate a date far in the future or past? Yes, the calculation works for any valid calendar date range, whether counting forward or backward.