Las Mañanitas is a traditional Mexican birthday serenade, customarily sung in the early morning to wake the birthday person, which is what the title refers to. Passed down through generations as a folk song of uncertain authorship, it became a fixture of birthdays, saint's days and family gatherings across Mexico and Latin America. Short excerpts like this one now circulate widely online, where people grab them for ringtones, birthday messages and party videos that need the tune's unmistakable festive warmth in just a few seconds.