Topics
Six subjects, each collecting the articles and tools that belong together.
Military and 24-Hour Time
Convert and read 24-hour time: the full conversion table, how to say each hour aloud, the midnight question, and worked examples for individual times.
12 articlesWork Hours and Payroll
Count shift hours, overnight shifts, overtime, business days and pay periods — including the decimal-hours conversion that payroll systems expect.
11 articlesTimestamps and Programming
Unix time, epochs, ISO 8601, monotonic clocks and the 2038 problem — how computers actually store and compare moments in time.
22 articlesTime Zones and Daylight Saving
How time zones, UTC offsets and daylight saving actually work, including half-hour offsets and scheduling across zones.
8 articlesCounting Days and Weeks
Date arithmetic done properly: days between dates, inclusive versus exclusive counting, week numbers, and how many weeks a year really holds.
19 articlesPlanning and Productivity
Working with time rather than against it: deadline planning, the Pomodoro technique, and scheduling methods that survive contact with a calendar.
4 articlesCalendars and History
Where our calendar came from: leap years, the seven-day week, February's 28 days, the Gregorian reform, and the clocks that came before.
20 articles