Information piracy in Russia is not eradicated! It is in the genes!
Trying to understand the reasons for the difference in dates of similar holidays of Orthodoxy and Catholicism, this is what I paid attention to. Remember what religion Prince Vladimir chose for the baptism of Russia. Not a paid licensed Catholicism with the support of the Pope, but freelance unlicensed Orthodoxy! and tk. There is no access to upgrades and patches, we are still orthodox. I think it is necessary to demand permission for the revision of the originals of Christianity! It is open source!