Answer: julian

AnswerCrossword Clue
JULIANCalendar established in 46 BCE
JULIANLennon's boy
JULIANCaesar's .. calendar
JULIANJohn Lennon's son
JULIANLennon junior
JULIANGregorian Calendar preceder
JULIANOf the first Caesar
JULIANPresent-day calendar.
JULIANBond of Georgia
JULIANGregorian antecedent
JULIANCalendar used for nearly two millennia