Dates written in publications after 1918 concerning events that occurred before 1918 are normally given in both styles, e.g. Lenin's birthday is cited as 10 (22).4.1870. The new date is April 22, 1870.
For Lomonosov's birth and death dates, 8 (19).11.1711-4 (15).4.1765.
IUrii Andropov's birthday: 2 (15).6.1914.
For NACO purposes, cite only the modern (later) form. If the change in date involves a change in years, also use the later date.