Anniversary Calculator
Time Together
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Next Anniversary
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Upcoming Milestones
How It Works
We calculate the time elapsed since your start date and project future dates based on your selected interval.
$$ \text{Next Date} = \text{Start} + \lceil \frac{\text{Now} - \text{Start}}{\text{Interval}} \rceil \times
\text{Interval} $$
FAQ
What about leap years?
For yearly anniversaries starting on Feb 29, standard convention uses Feb 28 in non-leap years. This calculator follows that standard.