Video guide
Leap years and why we need them
Selected because leap years are directly relevant to exact age calculations and calendar-based date differences. It supplements the page's Gregorian calendar handling by explaining why some years add a February day.
Source: BBC News · Published 2020-02-29
Open original on YouTubeWhy selected: Selected because leap years are directly relevant to exact age calculations and calendar-based date differences.
What it adds: It supplements the page's Gregorian calendar handling by explaining why some years add a February day.
How to use it: Use the calculator for exact years, months, and days, then use the video to understand leap-year edge cases.
Open AgeAge: The video explains calendar rules broadly and does not cover every jurisdictional calendar reform or historical date system.
Calculator Suite curates and contextualizes this public lesson but does not own, publish, or endorse every statement in the original video.