A birthday is considered a special day for the person, and so the person will often get special treatment from friends and family. This is especially true for children, who eagerly anticipate their own special day. In addition to parties, people often receive gifts on their birthday. Birthday parties for children often include fun games, which are relevant to the local culture, or the visit of a magician to entertain. Typical birthday party decorations include balloons, streamers and confetti. There are also traditions of surprise parties. Not all traditions are equally generous. In certain circles, the birthday boy or girl is expected to treat their party guests; this varies depending on the local culture and may involve party gifts or other nice gesture. In some cultures, the birthday at which the youngster reaches the legal age for alcohol consumption may be celebrated with a party at which free or abundant alcoholic drinks are available.

In most English-speaking countries it is traditional to sing the song Happy Birthday to You to the honored person celebrating a birthday. The Happy Birthday song tune is thought to be the most frequently sung melody in the world. Similar songs exist in other languages such as "Lang zal hij/zij leven" (and several others) in Dutch, "Zum Geburtstag Viel Glück" in German, "Feliz Cumpleaños" in Spanish, "Sto lat" in Polish, "Lá Bhreithlá Shona Duit" in Irish, "Joyeux Anniversaire" in French, "Tanti Auguri a te" in Italian and "Iyi ki dogdun, Mutlu Yillar Sana" in Turkish. This happens traditionally at a birthday party while someone brings a birthday cake into the (often darkened) room. Druze is a religion which celebrate this event.