Online Calendar 2021 with Holidays and Week Numbers, the first day of the week as Sunday. The year 2021 won’t be a leap year, it will have 365 days.
It will begin and end with a Friday. It will be in the 21. century. ISO 8601: The first calendar week of the year will begin on Sunday, January the 3. This year will have 52 calendar weeks.
Online Calendar 2021 with Holidays
User-friendly online calendar 2021 with holidays, the dates are listed by month including US. federal holidays and week numbers.
January 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
53
1
2
1
3
4
5
6
7
8
9
2
10
11
12
13
14
15
16
3
17
18
19
20
21
22
23
4
24
26
26
27
28
29
30
5
31
February 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
5
1
2
3
4
5
6
6
7
8
9
10
11
12
13
7
14
15
16
17
18
19
20
8
21
22
23
24
25
26
27
9
28
March 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
9
1
2
3
4
5
6
10
7
8
9
10
11
12
13
11
14
15
16
17
18
19
20
12
21
22
23
24
25
26
27
13
28
29
30
31
April 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
13
1
2
3
14
4
5
6
7
8
9
10
15
11
12
13
14
15
16
17
16
18
19
20
21
22
23
24
17
25
26
27
28
29
30
May 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
17
1
18
2
3
4
5
6
7
8
19
9
10
11
12
13
14
15
20
16
17
18
19
20
21
22
21
23
24
25
26
27
28
29
22
30
31
June 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
22
1
2
3
4
5
23
6
7
8
9
10
11
12
24
13
14
15
16
17
18
19
25
20
21
22
23
24
25
26
26
27
28
29
30
July 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
26
1
2
3
27
4
5
6
7
8
9
10
28
11
12
13
14
15
16
17
29
18
19
20
21
22
23
24
30
25
26
27
28
29
30
31
August 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
31
1
2
3
4
5
6
7
32
8
9
10
11
12
13
14
33
15
16
17
18
19
20
21
34
22
23
24
25
26
27
28
35
29
30
31
September 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
35
1
2
3
4
36
5
6
7
8
9
10
11
37
12
13
14
15
16
17
18
38
19
20
21
22
23
24
25
39
26
27
28
29
30
October 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
39
1
2
40
3
4
5
6
7
8
9
41
10
11
12
13
14
15
16
42
17
18
19
20
21
22
23
43
24
25
26
27
28
29
30
44
31
November 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
44
1
2
3
4
5
6
45
7
8
9
10
11
12
13
46
14
15
16
17
18
19
20
47
21
22
23
24
25
26
27
48
28
29
30
December 2021
No.
Su
Mo
Tu
We
Th
Fr
Sa
48
1
2
3
4
49
5
6
7
8
9
10
11
50
12
13
14
15
16
17
18
51
19
20
21
22
23
24
25
52
26
27
28
29
30
31
