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1990 Calendar with Week Numbers

1990 has 52 ISO weeks. Week 1 runs from Monday, January 1, 1990 to Sunday, January 7, 1990. Each row below starts on Monday and shows its week number; the table lists every week with its dates.

January 1990
Wk
M
T
W
T
F
S
S
1
1
2
3
4
5
6
7
2
8
9
10
11
12
13
14
3
15
16
17
18
19
20
21
4
22
23
24
25
26
27
28
5
29
30
31
February 1990
Wk
M
T
W
T
F
S
S
5
1
2
3
4
6
5
6
7
8
9
10
11
7
12
13
14
15
16
17
18
8
19
20
21
22
23
24
25
9
26
27
28
March 1990
Wk
M
T
W
T
F
S
S
9
1
2
3
4
10
5
6
7
8
9
10
11
11
12
13
14
15
16
17
18
12
19
20
21
22
23
24
25
13
26
27
28
29
30
31
April 1990
Wk
M
T
W
T
F
S
S
13
1
14
2
3
4
5
6
7
8
15
9
10
11
12
13
14
15
16
16
17
18
19
20
21
22
17
23
24
25
26
27
28
29
18
30
May 1990
Wk
M
T
W
T
F
S
S
18
1
2
3
4
5
6
19
7
8
9
10
11
12
13
20
14
15
16
17
18
19
20
21
21
22
23
24
25
26
27
22
28
29
30
31
June 1990
Wk
M
T
W
T
F
S
S
22
1
2
3
23
4
5
6
7
8
9
10
24
11
12
13
14
15
16
17
25
18
19
20
21
22
23
24
26
25
26
27
28
29
30
July 1990
Wk
M
T
W
T
F
S
S
26
1
27
2
3
4
5
6
7
8
28
9
10
11
12
13
14
15
29
16
17
18
19
20
21
22
30
23
24
25
26
27
28
29
31
30
31
August 1990
Wk
M
T
W
T
F
S
S
31
1
2
3
4
5
32
6
7
8
9
10
11
12
33
13
14
15
16
17
18
19
34
20
21
22
23
24
25
26
35
27
28
29
30
31
September 1990
Wk
M
T
W
T
F
S
S
35
1
2
36
3
4
5
6
7
8
9
37
10
11
12
13
14
15
16
38
17
18
19
20
21
22
23
39
24
25
26
27
28
29
30
October 1990
Wk
M
T
W
T
F
S
S
40
1
2
3
4
5
6
7
41
8
9
10
11
12
13
14
42
15
16
17
18
19
20
21
43
22
23
24
25
26
27
28
44
29
30
31
November 1990
Wk
M
T
W
T
F
S
S
44
1
2
3
4
45
5
6
7
8
9
10
11
46
12
13
14
15
16
17
18
47
19
20
21
22
23
24
25
48
26
27
28
29
30
December 1990
Wk
M
T
W
T
F
S
S
48
1
2
49
3
4
5
6
7
8
9
50
10
11
12
13
14
15
16
51
17
18
19
20
21
22
23
52
24
25
26
27
28
29
30
1
31

All 52 Weeks of 1990

WeekStarts (Mon)Ends (Sun)Federal holidays
1Jan 1, 1990Jan 7, 1990New Year's Day
2Jan 8, 1990Jan 14, 1990—
3Jan 15, 1990Jan 21, 1990MLK Day
4Jan 22, 1990Jan 28, 1990—
5Jan 29, 1990Feb 4, 1990—
6Feb 5, 1990Feb 11, 1990—
7Feb 12, 1990Feb 18, 1990—
8Feb 19, 1990Feb 25, 1990Presidents' Day
9Feb 26, 1990Mar 4, 1990—
10Mar 5, 1990Mar 11, 1990—
11Mar 12, 1990Mar 18, 1990—
12Mar 19, 1990Mar 25, 1990—
13Mar 26, 1990Apr 1, 1990—
14Apr 2, 1990Apr 8, 1990—
15Apr 9, 1990Apr 15, 1990—
16Apr 16, 1990Apr 22, 1990—
17Apr 23, 1990Apr 29, 1990—
18Apr 30, 1990May 6, 1990—
19May 7, 1990May 13, 1990—
20May 14, 1990May 20, 1990—
21May 21, 1990May 27, 1990—
22May 28, 1990Jun 3, 1990Memorial Day
23Jun 4, 1990Jun 10, 1990—
24Jun 11, 1990Jun 17, 1990—
25Jun 18, 1990Jun 24, 1990—
26Jun 25, 1990Jul 1, 1990—
27Jul 2, 1990Jul 8, 1990Independence Day
28Jul 9, 1990Jul 15, 1990—
29Jul 16, 1990Jul 22, 1990—
30Jul 23, 1990Jul 29, 1990—
31Jul 30, 1990Aug 5, 1990—
32Aug 6, 1990Aug 12, 1990—
33Aug 13, 1990Aug 19, 1990—
34Aug 20, 1990Aug 26, 1990—
35Aug 27, 1990Sep 2, 1990—
36Sep 3, 1990Sep 9, 1990Labor Day
37Sep 10, 1990Sep 16, 1990—
38Sep 17, 1990Sep 23, 1990—
39Sep 24, 1990Sep 30, 1990—
40Oct 1, 1990Oct 7, 1990—
41Oct 8, 1990Oct 14, 1990Columbus Day
42Oct 15, 1990Oct 21, 1990—
43Oct 22, 1990Oct 28, 1990—
44Oct 29, 1990Nov 4, 1990—
45Nov 5, 1990Nov 11, 1990Veterans Day
46Nov 12, 1990Nov 18, 1990—
47Nov 19, 1990Nov 25, 1990Thanksgiving
48Nov 26, 1990Dec 2, 1990—
49Dec 3, 1990Dec 9, 1990—
50Dec 10, 1990Dec 16, 1990—
51Dec 17, 1990Dec 23, 1990—
52Dec 24, 1990Dec 30, 1990Christmas Day

1990 Week Numbers FAQ

How many weeks are in 1990?

1990 has 52 ISO weeks. Week 1 runs from Monday, January 1, 1990 to Sunday, January 7, 1990, and week 52 ends on Sunday, December 30, 1990.

What week number is January 1, 1990?

January 1, 1990 is a Monday in week 1 of 1990.

How are ISO week numbers counted?

ISO 8601 weeks start on Monday. Week 1 is the week that contains the first Thursday of the year, which is the same as the week that contains January 4. A year has 52 weeks, or 53 when it starts on a Thursday (or on a Wednesday in a leap year).

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