Assyrian Liturgy

This is an excerpt from the Nativity Liturgy in an Assyrian Church in Russia.

I noticed that they blessed themselves Byzantine style, purified
their hands and faces in the incense at Communion–and celebrated
according to the Julian Calendar. I also noticed that the bishop did NOT wear a Western mitre, as their counterparts the Chaldean Catholics do.

All the Assyrians I’ve met in the USA have been totally New Calendar and Western Paschalion, but these seem to be totally Old Calendar. Could this be because they are in Russia?

Quite probably; IIRC one of the Tsars banned the “New Calendar”… as a civil ordinance. I can’t get to my Russian History texts to check whom.