1905 ( MCMV ) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar , the 1905th year of the Common Era (CE) and Anno Domini (AD) designations, the 905th year of the 2nd millennium , the 5th year of the 20th century , and the 6th year of the 1900s decade. As of the start of 1905, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.