Illustrative example. The dates and amounts below are provided for practice.
A birthday should appear on March 1 in common years and February 29 in leap years. A simple yearly rule anchored on February 29 would not express that preference in every year.
Create a yearless February 29 Birthday record, select Every year, and set the Leap Day Rule to March 1. Select it in the exporter and download ICS.
Read what was generated
The export contains up to 20 dated instances, each with its own identifier and all-day dates, rather than one ordinary yearly recurrence. For a fixed reference of January 1, 2027, the first two target dates are March 1, 2027 and February 29, 2028.
The live export starts from the next occurrence relative to today's local date. Review its actual range. Near the supported calendar's upper boundary, fewer instances may fit.
Keep future maintenance visible
Retain the JSON backup so you can generate further dates later. Reimporting a new batch can create duplicates depending on the destination, so test separately and compare existing copies.
That counting choice does not alter the saved common-year preference or extend the export horizon.