(({1))} (({2))} [O.S. (({3))}]
This template is used for displaying a date in both Old Style and New Style, including a discreet link to the article Adoption of the Gregorian calendar, in cases where the year differs between the Old Style and the New Style.
((OldStyleDateDY|NS day and month|NS year|OS day, month and year))
((OldStyleDateDY|10 January|1706|30 December 1705))
((OldStyleDateDY|January 10,|1706|December 30, 1705))