"A birthday is the anniversary of the birth of a person, or figuratively of an institution. Birthdays of people are celebrated in numerous cultures, often with birthday gifts, birthday cards, a birthday party, or a rite of passage.

Many religions celebrate the birth of their founders or religious figures with special holidays (e.g. Christmas, Mawlid, Buddha´s Birthday, and Krishna Janmashtami).

There is a distinction between birthday and birthdate: The former, other than February 29, occurs each year (e.g., January 15), while the latter is the exact date a person was born (e.g., January 15, 2001)." - ( 30.11.2019)

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Geburtstagstasse für Herzogin Sophie Dorothea von WürttembergModell eines UnterstandsRing mit Bild Herzog Christophs von WürttembergAnton Bausinger: Geburtstagsgruß an die MutterMedaille zum 65. Geburtstag von Ulrich KleinMedaille auf den 80. Geburtstag von Georg F. Schiller
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