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Uses ISO 8601 — the week containing the first Thursday is week one.
Weeks start on Monday, and the year a week belongs to is decided by which year its Thursday falls in. That means when 1 January lands on a Friday, Saturday or Sunday, it belongs to the last week of the previous year. Most companies that schedule by week number use this convention.
What this tool does
- ISO 8601 week number
- Quarter and day of year
- Monday to Sunday of that week
- Days remaining and progress
Other time tools
Timer and alarm sounds may not fire if the device goes to sleep.