To coincide with President Vladimir Putin’s birthday on Saturday, Russian opposition leader and presidential hopeful Alexei Navalny’s campaign has called for nationwide demonstrations.

Navalny was recently sentenced to 20 days behind bars ahead of a campaign event in Nizhny Novgorod.

Protests are planned in 80 Russian cities, including in Belgorod, near the Ukrainian border in western Russia, to Yekaterinburg in the Ural Mountains and Irkutsk, one of Siberia’s largest cities.

Events will be held throughout the day — at 2 p.m. in Moscow and 6 p.m. in St. Petersburg, Putin’s hometown.

Here are the highlights so far: