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1978 Calendar with Week Numbers

1978 has 52 ISO weeks. Week 1 runs from Monday, January 2, 1978 to Sunday, January 8, 1978, so January 1 still belongs to week 52 of 1977. Each row below starts on Monday and shows its week number; the table lists every week with its dates.

January 1978
Wk
M
T
W
T
F
S
S
52
1
1
2
3
4
5
6
7
8
2
9
10
11
12
13
14
15
3
16
17
18
19
20
21
22
4
23
24
25
26
27
28
29
5
30
31
February 1978
Wk
M
T
W
T
F
S
S
5
1
2
3
4
5
6
6
7
8
9
10
11
12
7
13
14
15
16
17
18
19
8
20
21
22
23
24
25
26
9
27
28
March 1978
Wk
M
T
W
T
F
S
S
9
1
2
3
4
5
10
6
7
8
9
10
11
12
11
13
14
15
16
17
18
19
12
20
21
22
23
24
25
26
13
27
28
29
30
31
April 1978
Wk
M
T
W
T
F
S
S
13
1
2
14
3
4
5
6
7
8
9
15
10
11
12
13
14
15
16
16
17
18
19
20
21
22
23
17
24
25
26
27
28
29
30
May 1978
Wk
M
T
W
T
F
S
S
18
1
2
3
4
5
6
7
19
8
9
10
11
12
13
14
20
15
16
17
18
19
20
21
21
22
23
24
25
26
27
28
22
29
30
31
June 1978
Wk
M
T
W
T
F
S
S
22
1
2
3
4
23
5
6
7
8
9
10
11
24
12
13
14
15
16
17
18
25
19
20
21
22
23
24
25
26
26
27
28
29
30
July 1978
Wk
M
T
W
T
F
S
S
26
1
2
27
3
4
5
6
7
8
9
28
10
11
12
13
14
15
16
29
17
18
19
20
21
22
23
30
24
25
26
27
28
29
30
31
31
August 1978
Wk
M
T
W
T
F
S
S
31
1
2
3
4
5
6
32
7
8
9
10
11
12
13
33
14
15
16
17
18
19
20
34
21
22
23
24
25
26
27
35
28
29
30
31
September 1978
Wk
M
T
W
T
F
S
S
35
1
2
3
36
4
5
6
7
8
9
10
37
11
12
13
14
15
16
17
38
18
19
20
21
22
23
24
39
25
26
27
28
29
30
October 1978
Wk
M
T
W
T
F
S
S
39
1
40
2
3
4
5
6
7
8
41
9
10
11
12
13
14
15
42
16
17
18
19
20
21
22
43
23
24
25
26
27
28
29
44
30
31
November 1978
Wk
M
T
W
T
F
S
S
44
1
2
3
4
5
45
6
7
8
9
10
11
12
46
13
14
15
16
17
18
19
47
20
21
22
23
24
25
26
48
27
28
29
30
December 1978
Wk
M
T
W
T
F
S
S
48
1
2
3
49
4
5
6
7
8
9
10
50
11
12
13
14
15
16
17
51
18
19
20
21
22
23
24
52
25
26
27
28
29
30
31

All 52 Weeks of 1978

WeekStarts (Mon)Ends (Sun)Federal holidays
1Jan 2, 1978Jan 8, 1978—
2Jan 9, 1978Jan 15, 1978—
3Jan 16, 1978Jan 22, 1978MLK Day
4Jan 23, 1978Jan 29, 1978—
5Jan 30, 1978Feb 5, 1978—
6Feb 6, 1978Feb 12, 1978—
7Feb 13, 1978Feb 19, 1978—
8Feb 20, 1978Feb 26, 1978Presidents' Day
9Feb 27, 1978Mar 5, 1978—
10Mar 6, 1978Mar 12, 1978—
11Mar 13, 1978Mar 19, 1978—
12Mar 20, 1978Mar 26, 1978—
13Mar 27, 1978Apr 2, 1978—
14Apr 3, 1978Apr 9, 1978—
15Apr 10, 1978Apr 16, 1978—
16Apr 17, 1978Apr 23, 1978—
17Apr 24, 1978Apr 30, 1978—
18May 1, 1978May 7, 1978—
19May 8, 1978May 14, 1978—
20May 15, 1978May 21, 1978—
21May 22, 1978May 28, 1978—
22May 29, 1978Jun 4, 1978Memorial Day
23Jun 5, 1978Jun 11, 1978—
24Jun 12, 1978Jun 18, 1978—
25Jun 19, 1978Jun 25, 1978—
26Jun 26, 1978Jul 2, 1978—
27Jul 3, 1978Jul 9, 1978Independence Day
28Jul 10, 1978Jul 16, 1978—
29Jul 17, 1978Jul 23, 1978—
30Jul 24, 1978Jul 30, 1978—
31Jul 31, 1978Aug 6, 1978—
32Aug 7, 1978Aug 13, 1978—
33Aug 14, 1978Aug 20, 1978—
34Aug 21, 1978Aug 27, 1978—
35Aug 28, 1978Sep 3, 1978—
36Sep 4, 1978Sep 10, 1978Labor Day
37Sep 11, 1978Sep 17, 1978—
38Sep 18, 1978Sep 24, 1978—
39Sep 25, 1978Oct 1, 1978—
40Oct 2, 1978Oct 8, 1978—
41Oct 9, 1978Oct 15, 1978Columbus Day
42Oct 16, 1978Oct 22, 1978—
43Oct 23, 1978Oct 29, 1978—
44Oct 30, 1978Nov 5, 1978—
45Nov 6, 1978Nov 12, 1978Veterans Day
46Nov 13, 1978Nov 19, 1978—
47Nov 20, 1978Nov 26, 1978Thanksgiving
48Nov 27, 1978Dec 3, 1978—
49Dec 4, 1978Dec 10, 1978—
50Dec 11, 1978Dec 17, 1978—
51Dec 18, 1978Dec 24, 1978—
52Dec 25, 1978Dec 31, 1978Christmas Day

1978 Week Numbers FAQ

How many weeks are in 1978?

1978 has 52 ISO weeks. Week 1 runs from Monday, January 2, 1978 to Sunday, January 8, 1978, and week 52 ends on Sunday, December 31, 1978.

What week number is January 1, 1978?

January 1, 1978 is a Sunday, so it belongs to week 52 of 1977. Week 1 of 1978 starts on Monday, January 2, 1978.

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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