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Jerkmate
https://www.timeanddate.com/date/leapyear.html
Leap Years (Is 2026 a Leap Year?)
What is a leap year, and when is the next one? Find out if 2026 is a leap year, how they are calculated, and why we use them.
leap years2026
https://www.mathsisfun.com/leap-years.html
Leap Years
A normal year has 365 days. A Leap Year has 366 days (the extra day is the 29th of February). Try it here: Because the Earth rotates about...
leap years
https://earthsky.org/human-world/why-do-we-need-leap-years/
Leap years, and why 2026 isn’t one
leap years2026one
https://xkcd.com/2897/
xkcd: Light Leap Years
leap yearsxkcdlight
https://melmagazine.com/en-us/story/five-lies-youve-been-told-about-leap-years
Five Lies You’ve Been Told About Leap Years
Feb 27, 2020 - The world is full of lies, and it’s hard to get through life without taking a few on board. Luckily, we’re here to sort the...
five liesleap yearstold
https://jira.mariadb.org/browse/MDEV-38455
[MDEV-38455] Partial dates validation doesn't keep into account leap years - Jira
leap yearsmdevpartialdatesvalidation