Dates & Timesflags: g

ISO 8601 Date

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

Try it in RegexPro

Pattern

regexJavaScript
/\d{4}-(?:0[1-9]|1[0-2])-(?:0[1-9]|[12]\d|3[01])/g

Raw source: \d{4}-(?:0[1-9]|1[0-2])-(?:0[1-9]|[12]\d|3[01])

How it works

Year is any 4-digit number. Month uses alternation to enforce 01-12. Day enforces 01-31, though it won't catch month-specific overflows (e.g. Feb 30).

Examples

Input

2024-01-15

Matches

  • 2024-01-15

Input

1999-12-31

Matches

  • 1999-12-31

Input

2024-13-01

No match

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Common use cases

  • Log file timestamp extraction
  • API response date validation
  • Database query parsing
  • Data migration scripts
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