regex101: <input type="date" /> pattern

Pro

^start of line

Group 1(000[1-9]|00[1-9]\d|0[1-9]\d\d|100\d|10[1-9]\d|1[1-9]\d{2}|[2-9]\d{3}|[1-9]\d{4}|1\d{5}|2[0-6]\d{4}|27[0-4]\d{3}|275[0-6]\d{2}|2757[0-5]\d|275760)

1st Alternative000[1-9]

000the literal text 000

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative00[1-9]\d

00the literal text 00

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

\da digit

3rd Alternative0[1-9]\d\d

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

\da digit

4th Alternative100\d

100the literal text 100

\da digit

5th Alternative10[1-9]\d

10the literal text 10

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

\da digit

6th Alternative1[1-9]\d{2}

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

\d{2}a digit, repeated exactly 2 times

7th Alternative[2-9]\d{3}

Character Class[2-9]

2-9one character from 2 (50₁₀) to 9 (57₁₀)

\d{3}a digit, repeated exactly 3 times

8th Alternative[1-9]\d{4}

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

\d{4}a digit, repeated exactly 4 times

9th Alternative1\d{5}

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\d{5}a digit, repeated exactly 5 times

10th Alternative2[0-6]\d{4}

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-6]

0-6one character from 0 (48₁₀) to 6 (54₁₀)

\d{4}a digit, repeated exactly 4 times

11th Alternative27[0-4]\d{3}

27the literal text 27

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\d{3}a digit, repeated exactly 3 times

12th Alternative275[0-6]\d{2}

275the literal text 275

Character Class[0-6]

0-6one character from 0 (48₁₀) to 6 (54₁₀)

\d{2}a digit, repeated exactly 2 times

13th Alternative2757[0-5]\d

2757the literal text 2757

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

\da digit

14th Alternative275760

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 2(0[1-9]|1[012])

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3(0[1-9]|[12]\d|3[01])

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

26 tokens

Regular Expression

^(000[1-9]|00[1-9]\d|0[1-9]\d\d|100\d|10[1-9]\d|1[1-9]\d{2}|[2-9]\d{3}|[1-9]\d{4}|1\d{5}|2[0-6]\d{4}|27[0-4]\d{3}|275[0-6]\d{2}|2757[0-5]\d|275760)-(0[1-9]|1[012])-(0[1-9]|[12]\d|3[01])$

New

2018-06-14

Min possible year :
0001-05-31

Max possible year :
275760-01-01

Extraction

2018-06-14

Min possible year :
0001-05-31

Max possible year :
275760-01-01