How to check a celebrity birthday before a calendar app or a printed list uses it: the named source, the public edit history, the recorded time zone and the official record route.
Eighteen musicians with July birthdays are listed with dates, acts, source classes, and a verification status, plus how July dates drift and the re-check cycle.
March birthdays in a celebrity calendar, from Einstein on the 14th to Clapton on the 30th, are civil dates shaped by calendar drift and Pope Gregory XIII's 1582 reform.
This celebrity birthday calendar lists historical figures with late year birthdays, the records behind their dates, and why a bad transcription hides a name.
Actors with February birthdays range from Jennifer Aniston to John Travolta, and the recorded date on a birth certificate becomes a citable entry in film databases.