In the OP assessed the justification for multi-day voting

Multi-day voting has fully justified itself, it is comfortable and safe for the citizens, said the head of the working group of the RF Public chamber on public control over the voting Maxim Grigoriev.

"Seven days is just a General vote. But we can already say that multi-day voting was proved. It is convenient for citizens. Most importantly, managed what was meant by the election commissions, i.e., dilution flow, no crowding, distributed people. We see almost all performed exemplary," said Gregory in a press briefing.

Earlier, the speaker of the Federation Council Valentina Matvienko has proposed to discuss the possibility of extending the vote for several days that applies in the General election on amendments to the Constitution, and the elections.

A nationwide vote on amendments to the Constitution of the Russian Federation was scheduled for 22 April, but then postponed because of the epidemic of coronavirus in the country. Later, Russian President Vladimir Putin signed a decree on a new date for voting on 1 July. Because of the need to take into account the epidemiological situation and the security of the population, it was decided that the Russians will be able to vote all week from 25 June to 1 July.