Ниже дано описание одного из праздников в России: «Festivities include a military parade on the Red Square in Moscow, laying wreaths on the Tomb of the Unknown Soldier, greeting war veterans and open-air concerts. Recently a new glorious action to commemorate those who defended our Motherland in the struggle against fascism has emerged on ordinary people’s initiative: “the Immortal Regiment” marches through the city centre with portraits of their relatives who were killed fighting for their Motherland or participated in the war battles. It looks really impressive. This remarkable event ends in a magnificent salute and fireworks in all hero-towns». О каком празднике идет речь?