Why Russia has two St. Patrick’s days this year

Informally, Russia has long marked St. Patrick's Day, joining the rest of the world in the March 17 celebration of Irish culture that includes lots of green and lots of drinking. This year, however, the Russian Orthodox Church is doing something different. It's formally celebrating St. Patrick's Day for the first time — but on March 30. […]

Source: http://www.washingtonpost.com/blogs/worldviews/wp/2017/03/17/why-russia-has-two-st-patricks-days-this-year/