Date (YYYY-MM-DD) Regex Pattern

Live Regex Tester

Pattern Breakdown

Code Examples

const regex = /^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$/;
const test = "2026-03-07";
console.log(regex.test(test)); // true

// Extract matches
const matches = test.match(regex);
console.log(matches);

import re

pattern = r'^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$'
test = "2026-03-07"
match = re.search(pattern, test)
print(match)  # Found!

package main

import (
    "fmt"
    "regexp"
)

func main() {
    re := regexp.MustCompile(`^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$`)
    fmt.Println(re.MatchString("2026-03-07")) // true
}

Common Use Cases

Match Examples

About the Date (YYYY-MM-DD) Regex

Validates dates in ISO 8601 format (YYYY-MM-DD) with valid month (01-12) and day (01-31) ranges.

Regular expressions (regex) are powerful pattern matching tools used across virtually all programming languages. The date (yyyy-mm-dd) pattern is classified as intermediate difficulty in the date & time category. It works in all major programming languages.

When using this regex, always consider edge cases and test thoroughly with real-world data. Use the interactive tester above to validate the pattern against your specific inputs before deploying to production.

More Date & Time Patterns