Which of these is not typically recognized as a regular holiday in many labor laws?

In many labor laws, regular holidays are typically designated days that are recognized nationwide and often include significant celebrations or observances. Christmas Day, Good Friday, and Maundy Thursday are all widely recognized based on religious and cultural significance within many jurisdictions, particularly in countries where Christianity is prevalent. These holidays typically provide employees with a day off with pay.

On the other hand, Valentine's Day is generally not recognized as a regular holiday under labor laws. It is primarily a cultural or commercial celebration focused on romantic relationships and does not carry the same weight or significance in terms of labor rights or national observance as the other holidays listed. Therefore, it does not warrant mandatory time off or pay under standard labor regulations.