Certificate of
True Birth Date
Issued on the authority of the Julian Day count
Date as recordedOctober 4, 1582 (julian)
True Gregorian dateOctober 14, 1582
Julian equivalentOctober 4, 1582
Day of the weekThursday
Calendar drift10 days
Julian Day Number2,299,160
The Julian calendar gained roughly one day every 128 years against the sun. This certificate restates the recorded date on the calendar the world actually uses today.