A leap-day wedding or work start needs an observance rule before you can plan its next annual celebration. The original date remains February 29, while common-year occurrences follow the rule you select.
Compare the two policies
Enter February 29, 2020 and February 28, 2025 in Anniversary Calculator. With February 28 selected, five years are complete and the next anniversary includes today. With March 1 selected, four years are complete and the next anniversary is tomorrow.
The total elapsed days stay the same under both policies. The rule changes when a calendar anniversary is considered complete. It does not add or remove days from the actual interval.
Coordinate the saved record
Use the same policy in the tracker so its countdown matches the calculator. Keep a one-time celebration on a convenient weekend separate from the annual anniversary.
When exporting, February 29 records use explicit future instances for up to 20 occurrences. Review the range before relying on a long-lived calendar copy. A plain yearly recurrence anchored on February 29 would not communicate the chosen common-year date.
People and institutions may use different conventions. Confirm which date matters for the specific celebration before making a reservation or writing an anniversary number on an invitation.