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1998 Calendar with Week Numbers

1998 has 53 ISO weeks. Week 1 runs from Monday, December 29, 1997 to Sunday, January 4, 1998. Each row below starts on Monday and shows its week number; the table lists every week with its dates.

January 1998
Wk
M
T
W
T
F
S
S
1
1
2
3
4
2
5
6
7
8
9
10
11
3
12
13
14
15
16
17
18
4
19
20
21
22
23
24
25
5
26
27
28
29
30
31
February 1998
Wk
M
T
W
T
F
S
S
5
1
6
2
3
4
5
6
7
8
7
9
10
11
12
13
14
15
8
16
17
18
19
20
21
22
9
23
24
25
26
27
28
March 1998
Wk
M
T
W
T
F
S
S
9
1
10
2
3
4
5
6
7
8
11
9
10
11
12
13
14
15
12
16
17
18
19
20
21
22
13
23
24
25
26
27
28
29
14
30
31
April 1998
Wk
M
T
W
T
F
S
S
14
1
2
3
4
5
15
6
7
8
9
10
11
12
16
13
14
15
16
17
18
19
17
20
21
22
23
24
25
26
18
27
28
29
30
May 1998
Wk
M
T
W
T
F
S
S
18
1
2
3
19
4
5
6
7
8
9
10
20
11
12
13
14
15
16
17
21
18
19
20
21
22
23
24
22
25
26
27
28
29
30
31
June 1998
Wk
M
T
W
T
F
S
S
23
1
2
3
4
5
6
7
24
8
9
10
11
12
13
14
25
15
16
17
18
19
20
21
26
22
23
24
25
26
27
28
27
29
30
July 1998
Wk
M
T
W
T
F
S
S
27
1
2
3
4
5
28
6
7
8
9
10
11
12
29
13
14
15
16
17
18
19
30
20
21
22
23
24
25
26
31
27
28
29
30
31
August 1998
Wk
M
T
W
T
F
S
S
31
1
2
32
3
4
5
6
7
8
9
33
10
11
12
13
14
15
16
34
17
18
19
20
21
22
23
35
24
25
26
27
28
29
30
36
31
September 1998
Wk
M
T
W
T
F
S
S
36
1
2
3
4
5
6
37
7
8
9
10
11
12
13
38
14
15
16
17
18
19
20
39
21
22
23
24
25
26
27
40
28
29
30
October 1998
Wk
M
T
W
T
F
S
S
40
1
2
3
4
41
5
6
7
8
9
10
11
42
12
13
14
15
16
17
18
43
19
20
21
22
23
24
25
44
26
27
28
29
30
31
November 1998
Wk
M
T
W
T
F
S
S
44
1
45
2
3
4
5
6
7
8
46
9
10
11
12
13
14
15
47
16
17
18
19
20
21
22
48
23
24
25
26
27
28
29
49
30
December 1998
Wk
M
T
W
T
F
S
S
49
1
2
3
4
5
6
50
7
8
9
10
11
12
13
51
14
15
16
17
18
19
20
52
21
22
23
24
25
26
27
53
28
29
30
31

All 53 Weeks of 1998

WeekStarts (Mon)Ends (Sun)Federal holidays
1Dec 29, 1997Jan 4, 1998New Year's Day
2Jan 5, 1998Jan 11, 1998—
3Jan 12, 1998Jan 18, 1998—
4Jan 19, 1998Jan 25, 1998MLK Day
5Jan 26, 1998Feb 1, 1998—
6Feb 2, 1998Feb 8, 1998—
7Feb 9, 1998Feb 15, 1998—
8Feb 16, 1998Feb 22, 1998Presidents' Day
9Feb 23, 1998Mar 1, 1998—
10Mar 2, 1998Mar 8, 1998—
11Mar 9, 1998Mar 15, 1998—
12Mar 16, 1998Mar 22, 1998—
13Mar 23, 1998Mar 29, 1998—
14Mar 30, 1998Apr 5, 1998—
15Apr 6, 1998Apr 12, 1998—
16Apr 13, 1998Apr 19, 1998—
17Apr 20, 1998Apr 26, 1998—
18Apr 27, 1998May 3, 1998—
19May 4, 1998May 10, 1998—
20May 11, 1998May 17, 1998—
21May 18, 1998May 24, 1998—
22May 25, 1998May 31, 1998Memorial Day
23Jun 1, 1998Jun 7, 1998—
24Jun 8, 1998Jun 14, 1998—
25Jun 15, 1998Jun 21, 1998—
26Jun 22, 1998Jun 28, 1998—
27Jun 29, 1998Jul 5, 1998Independence Day
28Jul 6, 1998Jul 12, 1998—
29Jul 13, 1998Jul 19, 1998—
30Jul 20, 1998Jul 26, 1998—
31Jul 27, 1998Aug 2, 1998—
32Aug 3, 1998Aug 9, 1998—
33Aug 10, 1998Aug 16, 1998—
34Aug 17, 1998Aug 23, 1998—
35Aug 24, 1998Aug 30, 1998—
36Aug 31, 1998Sep 6, 1998—
37Sep 7, 1998Sep 13, 1998Labor Day
38Sep 14, 1998Sep 20, 1998—
39Sep 21, 1998Sep 27, 1998—
40Sep 28, 1998Oct 4, 1998—
41Oct 5, 1998Oct 11, 1998—
42Oct 12, 1998Oct 18, 1998Columbus Day
43Oct 19, 1998Oct 25, 1998—
44Oct 26, 1998Nov 1, 1998—
45Nov 2, 1998Nov 8, 1998—
46Nov 9, 1998Nov 15, 1998Veterans Day
47Nov 16, 1998Nov 22, 1998—
48Nov 23, 1998Nov 29, 1998Thanksgiving
49Nov 30, 1998Dec 6, 1998—
50Dec 7, 1998Dec 13, 1998—
51Dec 14, 1998Dec 20, 1998—
52Dec 21, 1998Dec 27, 1998Christmas Day
53Dec 28, 1998Jan 3, 1999New Year's Day

1998 Week Numbers FAQ

How many weeks are in 1998?

1998 has 53 ISO weeks. Week 1 runs from Monday, December 29, 1997 to Sunday, January 4, 1998, and week 53 ends on Sunday, January 3, 1999. 1998 has a 53rd week because it starts on a Thursday.

What week number is January 1, 1998?

January 1, 1998 is a Thursday in week 1 of 1998.

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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