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Notes from building MyDailyTools. Mostly practical references for developers, designers, and anyone who needs a calculator that doesn't lie.

2026-05-03 7 min read
ISO 8601 Cheat Sheet: Timestamps, Durations, and Intervals You'll Actually Use
A practical reference for ISO 8601 — date, time, timezone, durations, and intervals — with copy-pasteable examples for the formats developers actually need.
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