Monday after Jesus Christ's Resurrection is called Light Monday in Ukraine. Orthodox and Greek Catholic believers traditionally visit the tombs of their relatives in the cemeteries on Light Monday. I visited too.
And this day Lviv's Armenians have also recollected all deads in the Armenian genocide, organized by Osman Empire's power in 1915. April, 24 is a date of the recollection of the first genocide in XX century, Armenian genocide of 1915, but this year all Christians celebrate Easter on April 24, so Lviv's Armenians decided to recollect the victims of their nation a day later, when Ukrainians usually recollect the dead relatives.
So vichna pam'yat' (eternal recollection) for all those deads, who everyone've recollected this day.