Birthday is the name given to the day that some people in many
cultures celebrate the anniversary of the day they were born. It is
often marked by a birthday party with family and/or friends when gifts
are given to the person celebrating the birthday. It is also customary
to treat people specially on their birthday, either generally acceding
to their wishes, or subjecting them to a rite of transition.
It is thought the large-scale celebration of birthdays in Europe began
with the cult of Mithras, which originated in Persia but was spread by
soldiers throughout the Roman Empire. Such celebrations were uncommon
previously so practices from other contexts such as the Saturnalia were
adapted for birthdays. Because many Roman soldiers took to Mithraism, it
had a wide distribution and influence throughout the empire until it was
supplanted by Christianity.
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