What is the regex pattern for date (mm/dd/yyyy)?

The regex pattern for date (mm/dd/yyyy) is: ^(0[1-9]|1[0-2])/(0[1-9]|[12]\d|3[01])/(19|20)\d{2}$.

How does the date (mm/dd/yyyy) regex work?

^: Start of string. (0[1-9]|1[0-2]): Month: 01-12. /: Slash separator. (0[1-9]|[12]\d|3[01]): Day: 01-31. /: Slash separator. (19|20)\d{2}: Year: 1900-2099. $: End of string.

Regex for Date (MM/DD/YYYY)

Matches dates in MM/DD/YYYY format with basic validation for month (01-12) and day (01-31) ranges.

Pattern

/^(0[1-9]|1[0-2])/(0[1-9]|[12]\d|3[01])/(19|20)\d{2}$/

Pattern Breakdown

Token	Explanation
^	Start of string
(0[1-9]\|1[0-2])	Month: 01-12
/	Slash separator
(0[1-9]\|[12]\d\|3[01])	Day: 01-31
/	Slash separator
(19\|20)\d{2}	Year: 1900-2099
$	End of string

Test Examples

Input	Match?
03/15/2026	Match
12/31/1999	Match
13/01/2020	No match
00/15/2020	No match
3/5/2020	No match

Common Use Cases

Date input validation
Form field formatting
Data import parsing

Variations

^\d{1,2}/\d{1,2}/\d{4}$

Allows single-digit month and day

^(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])-(19|20)\d{2}$

Uses dashes instead of slashes

Other Regex Patterns

Email Address US Phone Number International Phone Number URL IPv4 Address IPv6 Address Date (ISO 8601 YYYY-MM-DD)Time (HH:MM, 24-hour)Credit Card Number US Social Security Number US ZIP Code Hex Color Code

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