Time & Dates
How to Convert Between Time Zones Using UTC Offsets
Skip the guesswork: convert the local time to UTC, then to the target zone. Includes half-hour offsets, date changes and a worked meeting-overlap example.
Time & Dates
Guides to durations, time zones, working days, date math and clock formats, explained step by step with worked examples.
Time & Dates
Daylight Saving Time: Why Some Days Have 23 or 25 Hours
When clocks change, a local day is no longer 24 hours. Learn what shifts, how it alters durations and meeting times, and how to calculate safely.
Time & Dates
Leap Year Rules Explained: Why 1900 Was Not but 2000 Was
Every fourth year is a leap year, except when it is not. Learn the full three-part rule, the reason behind it and a formula for counting leap years.