Illustrative example. The dates and amounts below are provided for practice.
A relationship began March 1, 2023. The couple counts that date as Day 1 and wants to celebrate Day 365 before the first calendar anniversary.
Set Calculate Until Date to February 28, 2024 and choose Inclusive day numbers. The output is 364 elapsed days and inclusive Day 365. The next anniversary remains March 1, 2024.
Compare the three nearby dates
February 28 is inclusive Day 365. February 29 reaches 365 elapsed days and inclusive Day 366. March 1 is the calendar anniversary and reaches 366 elapsed days.
Those labels answer different questions. The leap day falls between the inclusive milestone and the annual anniversary, so using the phrase “one year” for every target would obscure the distinction.
Put the right event in the tracker
Save the Day 365 celebration as a one-time Personal Milestone on February 28. Save the relationship anniversary as an annual March 1 event.
When exporting or sharing, include the convention in the milestone title. The annual event follows the month and day each year, while the fixed day-number event is specific to this relationship timeline.