Date Format (YYYY-MM-DD) Validation Regex
Validate dates in ISO 8601 YYYY-MM-DD format. Matches dates like 2024-12-31 with proper month and day ranges.
Pattern & Test String
About This Pattern
Pattern: ^\d{4}-(?:0[1-9]|1[0-2])-(?:0[1-9]|[12][0-9]|3[01])$
Flags: g
Results
Enter a regex pattern to see the results here.
Frequently Asked Questions
Does this validate if the date actually exists?
This pattern validates format and basic ranges (months 01-12, days 01-31) but doesn't check if the date is valid (like February 31st). For full validation, use date parsing libraries.
Can I use this for other date formats like MM/DD/YYYY?
You'll need a different pattern for other formats. Replace hyphens with slashes and rearrange the groups: ^(0[1-9]|1[0-2])/(0[1-9]|[12][0-9]|3[01])/\d{4}$
Does it support timestamps or time components?
No, this is date-only. To include time (ISO 8601), append T\d{2}:\d{2}:\d{2} for HH:MM:SS format.
Practical Examples
Form Date Validation
Validate date inputs in booking or scheduling forms.
Log File Parsing
Extract dates from logs for analysis or filtering.
Data Import Validation
Validate date columns during CSV or API data imports.
Common Issues & Solutions
This pattern accepts invalid dates like 2024-02-31. Combine with actual date parsing for complete validation.
Leap years aren't validated by regex. February 29th will match even in non-leap years.
For dates before year 1000 or after 9999, adjust the \d{4} to \d{1,4} or similar.