What is anime happy bday?

"Happy Birthday" is not the name of an anime series. However, there are many anime shows and movies that feature birthdays as an important theme or event, such as "K-On!", "Clannad", "My Hero Academia", "Sword Art Online", and "Fullmetal Alchemist". These series often depict celebrations of birthdays as a time for bonding and reflecting on personal growth. Some anime also have special episodes dedicated to birthdays, either of the main characters or supporting characters. Overall, anime portrays birthdays as a significant moment in a person's life and a time to celebrate with loved ones.