Leap-day input record

Companion guide: https://matrixofdestiny.io/destiny-matrix-leap-day-birthdays
Original Matrix of Destiny editorial exercise · November 5, 2026

Use illustrative inputs for calculation experiments. The exercises and invented scenarios are learning resources, not testimonials or predictions.

Illustrative birth date:


Calendar-validity check:


Supported input range checked:


Fixed A/B/C/D/E:


Anniversary convention, if relevant:


Feature using that convention:


Layer where two results differ:


Keep private details out of shared copies.