Week 21 in 2001

WEEK
21

This week starts on Sunday, May 20, 2001 and ends on Saturday, May 26, 2001.

WEEK EUROPE & ISO
21

This week starts on Monday, May 21, 2001 and ends on Sunday, May 27, 2001.

Week 21 of 2001 begins on May 21, 2001 and ends on May 27, 2001. It covers days 141 to 147 of the year and falls in quarter 2.

Weeks since this week: 1324

Week 21 of 2001 at a glance

Starts (Monday)May 21, 2001
Ends (Sunday)May 27, 2001
US week (Sunday to Saturday)21 (May 20, 2001)
MonthMay
QuarterQ2
Days of the year141–147
Year completed at the end of this week40.3%
Weeks left in 2001 after this week31
Weeks in 200152
Even or odd weekOdd

Calendar for May 2001

May 2001
SuMoTuWeThFrSa
Week 1812345
Week 196789101112
Week 2013141516171819
Week 2120212223242526
Week 222728293031
USA Calendar

All Weeks in 2001:

Past & Future Week Number 21:

US and ISO week numbers

In the US system, where weeks start on Sunday and week 1 is the week that contains 1 January, this is week 21 of 2001. It runs from May 20, 2001 to May 26, 2001.

Even and odd weeks

Week 21 is an odd week. Even and odd week numbers are used for alternating schedules such as shift rotas, school timetables, custody arrangements and waste collection.

Week 21 in other years

FromTo
Week 21 in 1999May 24, 1999May 30, 1999
Week 21 in 2000May 22, 2000May 28, 2000
Week 21 in 2002May 20, 2002May 26, 2002
Week 21 in 2003May 19, 2003May 25, 2003

How week numbers are counted

Most of the world numbers weeks according to the ISO 8601 standard. A week starts on Monday, and week 1 is the week that contains the first Thursday of the year, which is always the week that contains 4 January.

Week 1 of 2001 began on January 1, 2001. 2001 has 52 ISO weeks.

Because of this rule, the first days of January can belong to the last week of the previous year, and the last days of December can belong to week 1 of the next year.

In the United States, weeks usually start on Sunday and week 1 is the week that contains 1 January, so the US week number can differ from the ISO week number.

Find the week number of a date

Frequently Asked Questions (FAQ)

When does week 21 of 2001 start and end?

Week 21 of 2001 starts on May 21, 2001 and ends on May 27, 2001 (ISO 8601, Monday to Sunday).

Which month is week 21 of 2001 in?

Week 21 of 2001 is in May.

What dates are in week 21 of 2001?

May 21, 2001, May 22, 2001, May 23, 2001, May 24, 2001, May 25, 2001, May 26, 2001, and May 27, 2001

How many weeks does 2001 have?

2001 has 52 ISO weeks.

Is week 21 an even or odd week?

Week 21 is an odd week.

What is the US week number for this week?

In the US system, where weeks start on Sunday and week 1 is the week that contains 1 January, this is week 21 of 2001. It runs from May 20, 2001 to May 26, 2001.