Flip calendar (RUS, US)

The development of this calendar is inspired by the view and arrangement of the old Soviet Union flip calendar from 1930. On this site found several options a similar design.
That the learned from them, that the himself coined.
This version with Russian text, but the file has a version with English text and also everyone can write the text (months and days of the week) in their native language.
When assembling the Case with Cards, no glue is required.
Perhaps someone will have to process