De Luizenmoeder is a Dutch television comedy that follows the parents and teachers around a primary school, and its blunt, recognisable dialogue has become popular in Dutch memes and short videos. The phrase verjaardag checken, meaning to check a birthday, fits that world of school calendars, class parties and parent-group messages, where a small scheduling mix-up can turn into a running joke. Shared online as a short reaction clip, it is now used by Dutch creators to punctuate birthday reminders, party planning and light teasing between friends.