Week 52 1999: December 27–2, 2000
Week 52 starts on Monday, December 27, 1999 and ends on Sunday, January 2, 2000.
Quick answer
Week 52 of 1999 is the seven-day ISO week from December 27, 1999 to January 2, 2000. ISO weeks always run from Monday to Sunday.
Use week 52 in professional planning
This permanent week reference can be used in project plans, payroll notes, weekly reports, production schedules and deadline documents. Share the week number together with the ISO year and exact date range to avoid ambiguity around New Year.
For calculations that span more than one week, use the weeks between dates calculator. For work schedules, compare the same range with the business days calculator or open the project timeline calculator.
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FAQ
What are the dates for week 52 of 1999?
The dates are December 27, 1999 through January 2, 2000.
What day does this week start?
It starts on Monday.
What day does this week end?
It ends on Sunday.
How should I write this week in a report?
Use “ISO week 52 of 1999 (Dec 27–Jan 2, 2000)” so the week-year and date range are both clear.