Days Since Date
Enter a past date and see how many days have passed until today. View the result in days, weeks, months and years, with optional working-day counting.
Days Since a Specific Date
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Quick Date Facts
Today
How this days since date calculator works
This tool calculates how much time has passed since a specific calendar date. It compares your chosen start date with today and returns the elapsed time in days, along with approximate values in weeks, months and years.
Examples of practical use
- Personal milestones: How many days have passed since a birthday, anniversary, or other meaningful date?
- Projects and work: How long has a project been running since its official start date?
- Contracts and memberships: How many days have elapsed since a contract or subscription began?
- Habits and streaks: How many consecutive days have I maintained a habit since a specific start date?
- Historical events: How many days have passed since a notable historical moment?
Related Calculators
Depending on what you want to calculate, you may also find our Days Between Dates Calculator useful for comparing two specific dates, or the Age Calculator if you want to calculate how old someone is on a given day. To plan future dates, the Add or Subtract Date Calculator helps you move forward or backward in time, while the Weekday Calculator shows which day of the week a date falls on.
- How many days are there between two important dates?
- Measure the length of a project or contract period.
- How old am I today?
- Calculate age on a specific past or future date.
- What date is a certain number of days from today?
- Adjust deadlines or planning dates.
- Which weekday did an event occur on?
- Check weekdays for scheduling purposes.
FAQ
How are the days since a date calculated?
The calculator compares your selected start date with today’s date and counts the number of calendar days in between. By default, the start date is excluded unless you enable the option to count it as a full day.
What does “count the start date as a full day” mean?
When this option is enabled, the chosen start date is included as an additional full day in the result.
Can I count only working days?
Yes. When enabled, the calculator counts only weekdays from Monday to Friday and excludes Saturdays and Sundays.
Can I use a future date?
This calculator works only with dates in the past or today. If you select a future date, an error message will be shown.
Do time zones or daylight saving time affect the result?
No. The calculation is based on whole calendar days and is not affected by time zones or daylight saving changes.