Enter a target date to see D-minus for a future date, D-Day for today, or D-plus for a past date. Add a title, repetition and reminder settings to save multiple events. Edit, delete or move events in the list.
Calculations use your local calendar date and update after midnight while the page is open. Past one-time events continue to show D-plus. Annual events show the next occurrence, including today.
On October 13, October 20 is D-7, October 13 is D-Day and October 6 is D+7. Annual February 29 events use February 28 in non-leap years while preserving the original registered date.
Select multiple preset and custom offsets; duplicate offsets are processed once. Reminders use local hours and minutes without audio playback. System delivery is not guaranteed when the site is closed or the device sleeps. Review unacknowledged internal reminders from the last 90 days on return.
Browser storage does not sync across devices. Export a JSON backup and confirm an import to merge it into your existing list. Invalid files do not change existing data. Back up before clearing browser data.