Date & Time
Age, duration & timezone calculators
How Many Days Since a Date?
Count up from a past date with a live timer — days, hours, minutes and seconds since any date you choose. Switch the direction to “Days since”, enter a custom past date, and the calculator shows the whole days elapsed, the weekday that date fell on, and a weeks-and-days breakdown, on top of a second-by-second timer read from your device clock. It is the same engine reversed — perfect for anniversaries, sobriety counts, milestones and “how long since” questions. The count is computed on UTC midnights so a day is always a full calendar day, and everything runs in your browser.
Days since = whole days elapsed from a past date to your reference date
- Set the direction to “Days since” and pick a custom date
- Live count-up timer + weeks-and-days breakdown
Frequently asked questions
How do I count the days since a date?
Set the direction to “Days since”, choose a custom past date, and the calculator counts up the whole days elapsed to your reference date, with a live days/hours/minutes/seconds timer. It works for anniversaries, milestones and “how long since” questions.
Can I count the days since a past holiday?
Yes. In days-since mode you can pick an event instead of a custom date and the tool counts up from its most recent past occurrence — the same engine as the countdown, reversed.