Find the number of days between two calendar dates and understand how positive and negative differences work.
Signed day difference
364
Absolute days
364
Weeks (full)
52
How it works
Calendar-day difference uses UTC midnight dates to avoid daylight-saving shifts.
Worked calculation
From January 1 to December 31, 2026 is 364 days excluding the start date. For the sample inputs, the calculator displays these results:
Signed day difference
364
Absolute days
364
Weeks (full)
52
Assumptions and limitations
Excludes the starting day and does not count holidays.
Results update as you change inputs. The values are calculated from the displayed inputs and assumptions, not obtained from an external measurement. Check units, rounding, and any special rules that apply to your situation.
