1906 followed by 1907
1906 (MCMVI) was a common year starting on Monday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1906th year of the Common Era (CE) and Anno Domini (AD) designations, the 906th  year of the 2nd millennium, the 6th  year of the 20th century, and the  7th   year of the 1900s decade. As of the start of 1906, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.