Kata

Your task is to write a regular expression (regex) that will match a string only if it contains at least one valid date, in the format [mm-dd] (that is, a two-digit month, followed by a dash, followed by a two-digit date, surrounded by square brackets).

You should assume the year in question is not a leap year. Therefore, the number of days each month should have are as follows:

• 1. January - 31 days
• 2. February - 28 days (leap years are ignored)
• 3. March - 31 days
• 4. April - 30 days
• 5. May - 31 days
• 6. June - 30 days
• 7. July - 31 days
• 8. August - 31 days
• 9. September - 30 days
• 10. October - 31 days
• 11. November - 30 days
• 12. December - 31 days

All text outside a valid date can be ignored, including other invalid dates.

For example:

"[01-23]" // January 23rd is a valid date
"[02-31]" // February 31st is an invalid date
"[02-16]" // valid
"[ 6-03]" // invalid format
"ignored [08-11] ignored" // valid
"[3] [12-04] [09-tenth]" // December 4th is a valid date