Original sentence: (link will display the full calendar) of the Gregorian calendar (or a common year starting on Wednesday of the 13-day slower Julian calendar).Year 1914 (MCMXIV) was a common year starting on Thursday
Edited sentence: It was the year that saw the start of what became known as World War I.Year 1914 (MCMXIV) was a common year which started on Thursday of the Gregorian calendar (or on Wednesday of the Julian calendar)