Week 49 1999: December 6–12, 1999
Week 49 starts on Monday, December 6, 1999 and ends on Sunday, December 12, 1999.
Quick answer
Week 49 of 1999 is the seven-day ISO week from December 6, 1999 to December 12, 1999. ISO weeks always run from Monday to Sunday.
Use week 49 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 49 of 1999?
The dates are December 6, 1999 through December 12, 1999.
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 49 of 1999 (Dec 6–Dec 12, 1999)” so the week-year and date range are both clear.