Everything you need to know about February 29, from cosmic alignments to proposals

Happy birthday to those born on February 29 — happy 21st birthday to all those Leap Day senior citizens!

In Ireland, February 29 becomes an opportunity for women to propose to their partners, challenging traditional gender roles. 

February 29, the rare and elusive Leap Day, has once again graced our calendars, appearing only once every four years, and sometimes carrying with it a sense of the auspicious.

But what is the significance of Leap Day?