Old Style

Noun

 * 1)  The Julian calendar system, especially with reference to Russia, where it continued to be used until the early 20th century.
 * 2)  A dating system in which March 25 is the New Year's Day.
 * 1)  A dating system in which March 25 is the New Year's Day.
 * 1)  A dating system in which March 25 is the New Year's Day.