How can I use regex to validate dates?

How can I use regex to validate dates?

You can use regex to match specific date formats. For example, to validate dates in the format YYYY-MM-DD, you can use the regex: ^\d{4}-\d{2}-\d{2}$.

What if I want to validate dates in DD/MM/YYYY format?

For DD/MM/YYYY format, you can use: ^(0[1-9]|[12][0-9]|3[01])/(0[1-9]|1[0-2])/(\d{4})$.

Can this regex handle leap years?

The basic regex won't handle leap years. You'd need additional logic to check if the year is a leap year.

Is there a regex for validating both formats?

Yes, you can combine them using the alternation operator: ^(\d{4}-\d{2}-\d{2}|(0[1-9]|[12][0-9]|3[01])/(0[1-9]|1[0-2])/(\d{4}))$.