Days Since Calculator
Count how many calendar days have passed since a date you choose.
How this calculator works
The calculator compares the chosen date with today's local calendar date and reports the difference in whole calendar days.
The result also shows the target weekday, full and ISO dates, full weeks plus remaining days, and a calendar view of the target date and today. You can copy the summary or download the target as a calendar file.
This page always compares one date with today. To compare any two dates instead, use the Days Between Dates Calculator.
The tool is arithmetic only. Where legal, payroll, holiday, timezone or jurisdiction-specific rules matter, the page states what is and is not included.
Frequently asked questions
What if I enter a future date?
The result indicates that the date is still in the future rather than presenting a misleading elapsed-days count.
Does today count as one day?
No. A target date of today returns 0 days since; yesterday returns 1 day since. The calculation measures elapsed calendar-day boundaries.
Can I copy or export the result?
Yes. Use "Copy result" for a text summary or "Download calendar file (.ics)" for the selected target date. The calculation is not saved by this site.