Regex Tester & Validator

This regular expression strictly validates dates in the `m/d/yyyy` or `mm/dd/yyyy` format, ensuring the correct number of days for each month. It accommodates leap years by allowing February 29th only for specific leap years in the 19th and 20th centuries (like 1904 or 2000). This pattern is highly useful for form validation, data entry checks, and ensuring chronological accuracy in data processing tasks.