Days since date calculator
Count how many days, weeks, months, hours, and minutes have passed since any date. Free days since calculator for anniversaries, streaks, and milestones.
How this days since calculator works
Enter the date and optional time of an event, and the calculator subtracts it from the current moment. The result updates automatically so you can see the exact number of days since the event began.
This is useful for anniversaries, sobriety dates, streaks, product launches, recovery timelines, and any milestone where the elapsed time matters.
Common ways to use days since
People often search for days since a birthday, days since a breakup, days since quitting a habit, or days since a project started. The same calculation works for all of them: pick the start date and the elapsed count becomes visible.
In Left, this maps closely to Since and streak tracking. Once you know the date, you can keep it visible on your iPhone widget instead of recalculating it.
Date and time accuracy
The calculator uses your local browser time zone. If the original event happened in another time zone, enter the equivalent local date and time for the most accurate count.
Start noticing what matters.
Download Left on your iPhone to see the time you have left, dates you are looking forward to, build the habits you want to keep, and become a better version of yourself.
Scan with your camera to find Left on the App Store. Or search "Left" on the App Store.