Ivan Vasilievich: Back To The Future ("Иван Васильевич меняет профессию") by one of the greatest comedy directors - Gaidai, 1973.
Russian Video: Ivan Vasilievich Changes Occupation (Movie)!
And the modern comedy -"О чем говорят мужчины" by Dmitry Dyachenko, 2010.
That is the third film with acquainted protagonists. This time they decided to have a trip. They had two days full of events and time to speak about life and women.