Ju ‧ li ‧ an cal ‧ en ‧ dar, the /ˌdʒuːliən ˈkæləndəʳ/ BrE AmE
the calendar introduced by ↑ Julius Caesar in Rome in 46 BC, that fixed the normal year at 365 days. The ↑ Gregorian calendar , the usual calendar used in western countries in modern times, is based on the Julian calendar.