How to Create a Regular Expression for Date Validation in DD/MM/YYYY Format in JavaScript?

Regular Expression for Date Validation in DD/MM/YYYY Format

Validating dates in Javascript is a common task, and ensuring proper validation for dates in the DD/MM/YYYY format is crucial. While there are numerous regex expressions available, finding the specific pattern for this format can be challenging.

Originally, the regex provided above was intended for YYYY-MM-DD format. To convert it for DD/MM/YYYY, simply flip the order of the day and month components:

/(0?[1-9]|[12][0-9]|3[01])[\/\-](0?[1-9]|1[012])[\/\-]\d{4}$/

This regex now validates dates in the DD/MM/YYYY format, allowing both slashes (/) and dashes (-) as separators. However, it's important to note that this will also allow dates that do not adhere to calendar rules (e.g., 31/02/4899).

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