Freelancer Day in Russia
Freelancer Day in Russia is held on May 14. This event in the second decade of the month may is annual.
Physicist Day on May 7 (since 1959);
Volga River Day in Russia on May 20 (celebrated since 2008);
Day of the seal in Russia on May 25 (Irkutsk region);
Crane Driver's Day in Russia on June 4 (or Crane Operator's Day is an unofficial holiday);