Show CAVA cae aar placed calendar lit in effect in in 45 B C in 45 B C caesar placed the solar year calendar in effect the solar year is approximately days caesar ruled that three of each four years should be days long and the fourth days the the leap day being taken care of by repeating february 23 caesar also decided that the month should become july in his honor the months and their number of days then as described by a chicago tribune writer were january 31 february 29 30 in leap year march 31 april 30 may 31 june 30 july 31 30 september 31 october 30 november 31 and december 30 after caesars caesara Cae sars death the pontiff erred in making every third year a leap year augustus julius successor corrected this suspending leap years until 8 A D then ordaining every fourth year to be a leap year that is why all leap years are divisible by four augustus also changed the name of the month to august in his honor not to be out done by caesar he gave august 31 days taking a day from february he also subtracted a day from september adding it to october and performed the same operation on november for decembers benefit calculation of the christian tra era is usually credited to dionysius exi geus in the sixth century he was somewhat in error however as it is believed jesus was born before what was januar january y 1 in the year 1 A D the phrase anno domini year of our lord of which A D is the abbreviation was believed to have been used first in 1219 |