Chronological Science & Calendar Math Blog
In-depth technical guides, historical reviews, and algorithmic breakdowns on how humans track and calculate time.
How Is Chronological Age Calculated? The Definitive Mathematical Guide
An exhaustive, 1,200+ word technical and historical breakdown of date borrowing, leap years, and calendar edge cases.
The Gregorian 400-Year Leap Year Rule Explained
Why century years not divisible by 400 skip leap years and how calendar systems eliminate astronomical drift.