What does this tool do?
Enter the original date and the calculator finds the next yearly occurrence, the anniversary number and the weekday it lands on. Leap-day anniversaries can be pinned to 28 February or 1 March.
The Formula
Next anniversary = original month and day in the current or next yearFrequently Asked Questions
How is the next anniversary chosen?
The calculator looks at the original month and day in the reference year. If that date has already passed, it moves to the same month and day in the following year.
What if the anniversary is 29 February?
In non-leap years the date is observed on 28 February by default, or on 1 March if you select it. The anniversary number still follows calendar years.