How to count days since a date
Use count up when you want to answer “How many calendar days since this date?” A saved date is enough; you do not need daily check-ins to keep the display advancing.
Work through a date example
October 1 to October 10 is 9 elapsed calendar days: the starting date is day zero, not day one. If you call the first date “day one” in your own notes, your inclusive count will be one higher. This is a counting convention, not a missing day.
Select count up when creating the counter and enter the actual starting date rather than today's date. Check the date shown on the detail screen if the number is surprising. Use Help for time-zone and calendar-day limitations.
Fix the date, not the counter
A mistyped month or year should be corrected with Edit date. You do not need to delete the counter, buy another counter, or reset it. Reset means a new start at today and is available for count-up counters.
The number is not evidence that you completed an activity every day. For a reliable daily log, keep check-ins elsewhere; Counter only knows its stored starting point.
Keep access and visibility in mind
Counter data is stored on servers. Save your recovery ID securely or link an optional recovery email. Browser storage loss can make counters inaccessible without deleting them.
Leave sharing off for personal dates. A public share page can be forwarded and indexed. A neutral label avoids unnecessarily exposing what the date represents.
Start tracking
Choose a date and keep its count close at hand.
Start tracking