Chronometry & Calendars Lab
TimeLedgers Editorial Archive
Explore our comprehensive research guides on global calendar systems, atomic frequency standards, international time zones, and the deep history of horology.
Decoding the Maya Calendar: Tzolk’in, Ha’ab, the Calendar Round, and the Long Count System
Mr. Jordon Funk II
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September 20, 2026
The Ancient Egyptian Civil Calendar: 365 Days, Decans, and the Sothic Cycle of Sirius
Mr. Jordon Funk II
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September 20, 2026
The World’s Most Unusual Time Zones: 30-Minute, 45-Minute Offsets, and Political Borders
Mr. Jordon Funk II
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September 20, 2026
Daylight Saving Time (DST): Origins, Energy Economics, Circadian Impacts, and Global Repeal Debates
Mr. Jordon Funk II
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September 19, 2026
Navigating the International Date Line: History, Zigzags, and Island Time Leaps
Mr. Jordon Funk II
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September 19, 2026
How World Time Zones Work: From Greenwich Mean Time (GMT) to Coordinated Universal Time (UTC)
Mr. Jordon Funk II
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September 19, 2026
The Chinese Lunisolar Calendar: 24 Solar Terms (Jieqi), Zodiac Animals, and the 60-Year Sexagenary Cycle
Mr. Jordon Funk II
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September 18, 2026
The Islamic Hijri Calendar: Lunar Cycles, Crescent Sighting, and Tabular Calculations
Mr. Jordon Funk II
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September 17, 2026
Gregorian vs. Julian Calendar: The Great 11-Day Shift, Papal Bull, and Leap Year Mathematics
Mr. Jordon Funk II
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September 16, 2026
The Complete Guide to Solar, Lunar, and Lunisolar Calendar Systems: Celestial Mechanics and Cultural Mathematics
Mr. Jordon Funk II
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September 15, 2026