Longest Calendar Year. Julius caesar added two extra leap months to recalibrate the calendar in preparation for his calendar reform, which went into effect in 45 bc. Year 46 bc is nicknamed the annus confusionis (“year of confusion”) and is the longest recorded calendar year in human history!.
By adding 90 days (two months and an intercalary month) to 46 bce, caesar’s reform made it the longest year recorded in human history, with 445 days. Some years seem longer than others, especially when you are passing through a bad phase in life such as being stuck at home because a pandemic is playing havoc around,.