Birthday

A birthday is the day when a person was born. In many places, on a person's birthday, he or she celebrates with friends and family at a party, where they eat cake or other foods, and get gifts. It is a common use to offer gifts in packages decorated for the occasion and accompanied by greeting cards.

100th Anniversary Birthday Cake

Customs

Not everyone celebrates birthdays, including Jehovah's Witnesses.

In much of the English-speaking world people sing the song "Happy Birthday to You" to the person celebrating her or his birthday. There are similar songs in other languages.

A birthday cake is usually decorated and covered with candles. Sometimes the number of candles is the same as the age of the birthday person.

Coming of age

Children usually reach their age of majority on a birthday.

• 

  A mixed fruit birthday cake

  In the United States of America and also in many other countries a person can vote and become a legal adult at age 18.
• In Judaism, boys have a bar mitzvah around the time they become 13. Girls sometimes have a bat mitzvah around their 12th or 13th birthday.
• In Latin America, a quinceañera party marks a girl's 15th birthday.

Astrology

A person's astrological sign is based on his or her birthday.

Symbolism

Birthstones

A birthstone symbolizes the month of birth. In 1912, the Jewelers of America agreed on a list of birthstones:

Month	Modern Birthstone[1]	Alternate	Traditional Birthstone[1]
January	Garnet	Rose Quartz	Garnet
February	Amethyst	Onyx	Amethyst
March	Aquamarine	Red Jasper (Bloodstone)	Bloodstone, Jasper
April	Diamond	Rock Crystal (Quartz)	Diamond, Sapphire
May	Emerald	Chrysoprase	Emerald, Agate
June	Pearl (the only non-mineral), Moonstone	Alexandrite	Alexandrite, Emerald
July	Ruby	Jade or Carnelian	Ruby, Onyx
August	Peridot	Aventurine, Sardonyx, or Sapphire	Sardonyx, Carnelian
September	Sapphire	Lapis lazuli	Sapphire, Peridot
October	Opal	Pink Tourmaline	Tourmaline, Aquamarine
November	Yellow Topaz	Citrine or Turquoise	Citrine, Topaz
December	Turquoise, Blue Topaz	Lapis Lazuli or Tanzanite	Zircon, Ruby