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Date Validations

Match the date values in the following formats:

dd-mm-yyyy
dd/mm/yyyy
dd.mm.yyyy

The year should be from 1900 to 2099.

1. Matching the day and the month values
Word Wrap
Let's start with matching the valid day values in the given text of numbers.
Enter input string
38 09 19 2019 35 30 2000 15 24 29 23 20 47 01 22 7 50 32 36 1975 18 45 28 31 40 34 190 37 48 0210 21 43 12 04 03 10 2 26 20100 14 39 27 1925 13 42 41 06 2025 16 46 2005 17 33 5 1980 25 49 44 1901 08 11
The day value should satisfy the following conditions:
It should be a two-digit text.
The first number should be either 0, 1, 2 or 3.
If the first number is 0, then the second number should be any number from 1 to 9 but not 0 - 0[1-9].
If the first number is 1 or 2, then the second number can be any number from 0 to 9 - [12][0-9].
If the first number is 3, then the second number should be either 0 or 1 only - 3[01].
Using the alternation (|), we can accomodate these conditions. For now, let's wrap the pattern with \b so that the pattern works on the number as a whole and not on sub numbers.
Day value regexp
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/\b(0[1-9]|[12][0-9]|3[01])\b/gCount:28
38 09 19 2019 35 30 2000 15 24 29 23 20 47 01 22 7 50 32 36 1975 18 45 28 31 40 34 190 37 48 0210 21 43 12 04 03 10 2 26 20100 14 39 27 1925 13 42 41 06 2025 16 46 2005 17 33 5 1980 25 49 44 1901 08 11
match position $1
09 3 09
19 6 19
30 17 30
15 25 15
24 28 24
29 31 29
23 34 23
20 37 20
01 43 01
22 46 22
18 65 18
28 71 28
31 74 31
21 98 21
12 104 12
04 107 04
03 110 03
10 113 10
26 118 26
14 127 14
27 133 27
13 141 13
06 150 06
16 158 16
17 169 17
25 182 25
08 196 08
11 199 11
The month value should satisfy the following conditions:
It should be a two-digit text.
The first number should be either 0 or 1.
If the first number is 0, then the second number should be any number from 1 to 9 but not 0 - 0[1-9].
If the first number is 1, then the second number can be any number from 0 to 2 - 1[012].
Month value regexp
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/\b(0[1-9]|1[012])\b/gCount:9
38 09 19 2019 35 30 2000 15 24 29 23 20 47 01 22 7 50 32 36 1975 18 45 28 31 40 34 190 37 48 0210 21 43 12 04 03 10 2 26 20100 14 39 27 1925 13 42 41 06 2025 16 46 2005 17 33 5 1980 25 49 44 1901 08 11
match position $1
09 3 09
01 43 01
12 104 12
04 107 04
03 110 03
10 113 10
06 150 06
08 196 08
11 199 11
The year value should satisfy the following conditions:
It should be a four-digit text.
The first two digits should be either 19 or 20 - (19|20).
The last two digits can be any numbers from 0 to 9 - \d{2}.
Year value regexp
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/\b(19|20)\d{2}\b/gCount:8
38 09 19 2019 35 30 2000 15 24 29 23 20 47 01 22 7 50 32 36 1975 18 45 28 31 40 34 190 37 48 0210 21 43 12 04 03 10 2 26 20100 14 39 27 1925 13 42 41 06 2025 16 46 2005 17 33 5 1980 25 49 44 1901 08 11
match position $1
2019 9 20
2000 20 20
1975 60 19
1925 136 19
2025 153 20
2005 164 20
1980 177 19
1901 191 19

match	position	$1
09	3	09
19	6	19
30	17	30
15	25	15
24	28	24
29	31	29
23	34	23
20	37	20
01	43	01
22	46	22
18	65	18
28	71	28
31	74	31
21	98	21
12	104	12
04	107	04
03	110	03
10	113	10
26	118	26
14	127	14
27	133	27
13	141	13
06	150	06
16	158	16
17	169	17
25	182	25
08	196	08
11	199	11

match	position	$1
09	3	09
01	43	01
12	104	12
04	107	04
03	110	03
10	113	10
06	150	06
08	196	08
11	199	11

match	position	$1
2019	9	20
2000	20	20
1975	60	19
1925	136	19
2025	153	20
2005	164	20
1980	177	19
1901	191	19

2. Date Regexp

Word Wrap

This input text contains both correct and incorect date values.

Enter input string

Let's combine the above with pattern for the delimiters [-/.].

But this pattern also matches incorrect values such as 18.03-2027.

/\b(0[1-9]|[12][0-9]|3[01])[-/.](0[1-9]|1[012])[-/.](19|20)\d{2}\b/gCount:22

12-12-2010 24-02-20100 14-15-2005 30-11-1950 16-02-201 32-12-2010
19/03/1910 16.10.2005 14.13.1985 09-03-2074
29-06-2078 19-09-1855 28-02-2090 06-05-1939 07.02.1934 13.12..1983
18.03-2027 23.12.1904 29-04-0901 10/05/2020 30/01.1993 16.01.2011
04-010-2063 03-02-2043 13-12-3015 05-06/2047 17-11-2000 30-12-2083
22-04-2005 34-03-1986 29-01-1971 05-02-1944 02-03-4079 16-02-2021

match	position	$1	$2	$3
12-12-2010	0	12	12	20
30-11-1950	34	30	11	19
19/03/1910	66	19	03	19
16.10.2005	77	16	10	20
09-03-2074	99	09	03	20
29-06-2078	110	29	06	20
28-02-2090	132	28	02	20
06-05-1939	143	06	05	19
07.02.1934	154	07	02	19
18.03-2027	177	18	03	20
23.12.1904	188	23	12	19
10/05/2020	210	10	05	20
30/01.1993	221	30	01	19
16.01.2011	232	16	01	20
03-02-2043	255	03	02	20
05-06/2047	277	05	06	20
17-11-2000	288	17	11	20
30-12-2083	299	30	12	20
22-04-2005	310	22	04	20
29-01-1971	332	29	01	19
05-02-1944	343	05	02	19
16-02-2021	365	16	02	20

We can fix this using backreference \2 instead of [-/.] for the delimiter's second appearance.

\b(01-9|12|301)(-/.)(01-9|1012)\2(19|20)\d{2}\b

/\b(0[1-9]|[12][0-9]|3[01])([-/.])(0[1-9]|1[012])\2(19|20)\d{2}\b/gCount:19

12-12-2010 24-02-20100 14-15-2005 30-11-1950 16-02-201 32-12-2010
19/03/1910 16.10.2005 14.13.1985 09-03-2074
29-06-2078 19-09-1855 28-02-2090 06-05-1939 07.02.1934 13.12..1983
18.03-2027 23.12.1904 29-04-0901 10/05/2020 30/01.1993 16.01.2011
04-010-2063 03-02-2043 13-12-3015 05-06/2047 17-11-2000 30-12-2083
22-04-2005 34-03-1986 29-01-1971 05-02-1944 02-03-4079 16-02-2021

match	position	$1	$2	$3	$4
12-12-2010	0	12	-	12	20
30-11-1950	34	30	-	11	19
19/03/1910	66	19	/	03	19
16.10.2005	77	16	.	10	20
09-03-2074	99	09	-	03	20
29-06-2078	110	29	-	06	20
28-02-2090	132	28	-	02	20
06-05-1939	143	06	-	05	19
07.02.1934	154	07	.	02	19
23.12.1904	188	23	.	12	19
10/05/2020	210	10	/	05	20
16.01.2011	232	16	.	01	20
03-02-2043	255	03	-	02	20
17-11-2000	288	17	-	11	20
30-12-2083	299	30	-	12	20
22-04-2005	310	22	-	04	20
29-01-1971	332	29	-	01	19
05-02-1944	343	05	-	02	19
16-02-2021	365	16	-	02	20

Except for the delimiters group ([-/.]), other groups can be made into non-capturing for a slight performance improvement. You can use (?:) to make it non-capturing groups and drop them from the results. You'll see just $1 instead of $1, $2, $3 and $4. The backreference \1 should be used as there is only one capturing group (for delimiters).

/\b(?:0[1-9]|[12][0-9]|3[01])([-/.])(?:0[1-9]|1[012])\1(?:19|20)\d{2}\b/gCount:19

12-12-2010 24-02-20100 14-15-2005 30-11-1950 16-02-201 32-12-2010
19/03/1910 16.10.2005 14.13.1985 09-03-2074
29-06-2078 19-09-1855 28-02-2090 06-05-1939 07.02.1934 13.12..1983
18.03-2027 23.12.1904 29-04-0901 10/05/2020 30/01.1993 16.01.2011
04-010-2063 03-02-2043 13-12-3015 05-06/2047 17-11-2000 30-12-2083
22-04-2005 34-03-1986 29-01-1971 05-02-1944 02-03-4079 16-02-2021

match	position	$1
12-12-2010	0	-
30-11-1950	34	-
19/03/1910	66	/
16.10.2005	77	.
09-03-2074	99	-
29-06-2078	110	-
28-02-2090	132	-
06-05-1939	143	-
07.02.1934	154	.
23.12.1904	188	.
10/05/2020	210	/
16.01.2011	232	.
03-02-2043	255	-
17-11-2000	288	-
30-12-2083	299	-
22-04-2005	310	-
29-01-1971	332	-
05-02-1944	343	-
16-02-2021	365	-

match	position	$1
09	3	09
19	6	19
30	17	30
15	25	15
24	28	24
29	31	29
23	34	23
20	37	20
01	43	01
22	46	22
18	65	18
28	71	28
31	74	31
21	98	21
12	104	12
04	107	04
03	110	03
10	113	10
26	118	26
14	127	14
27	133	27
13	141	13
06	150	06
16	158	16
17	169	17
25	182	25
08	196	08
11	199	11

match	position	$1
09	3	09
01	43	01
12	104	12
04	107	04
03	110	03
10	113	10
06	150	06
08	196	08
11	199	11

match	position	$1
09	3	09
19	6	19
30	17	30
15	25	15
24	28	24
29	31	29
23	34	23
20	37	20
01	43	01
22	46	22
18	65	18
28	71	28
31	74	31
21	98	21
12	104	12
04	107	04
03	110	03
10	113	10
26	118	26
14	127	14
27	133	27
13	141	13
06	150	06
16	158	16
17	169	17
25	182	25
08	196	08
11	199	11

match	position	$1
09	3	09
01	43	01
12	104	12
04	107	04
03	110	03
10	113	10
06	150	06
08	196	08
11	199	11

Day value regexp

Month value regexp

Year value regexp

match	position	$1
09	3	09
19	6	19
30	17	30
15	25	15
24	28	24
29	31	29
23	34	23
20	37	20
01	43	01
22	46	22
18	65	18
28	71	28
31	74	31
21	98	21
12	104	12
04	107	04
03	110	03
10	113	10
26	118	26
14	127	14
27	133	27
13	141	13
06	150	06
16	158	16
17	169	17
25	182	25
08	196	08
11	199	11

match	position	$1
09	3	09
01	43	01
12	104	12
04	107	04
03	110	03
10	113	10
06	150	06
08	196	08
11	199	11