Are you by chance referring to Saint Andrew Russian Greek Catholic Church in El Segundo? If so
their website calendar they listed 12 Feb as Meatfare Sunday which means they are on the new calendar.
If you have a commitment and so cannot go there on a Sunday, they list Presanctified Liturgy, 7:30 PM every Wednesday evening during Great Lent.
If you are asking about Russian Greek Catholics it is different. We have no heirarch and so are under Latin Bishops. (although we can see that churches like the UGCC with a heirarch also vary in different parishes whether they are on new or old calendar, or even like my Russian parish a combined “Revised Julian” calendar.)
In the case of Saint Andrew’s in El Segundo Father Alexei is priest to both St Andrew’s and St Paul’s Melkite so probably they are both on the same calendar. Likewise SS Cyril and Methodius Russian Byzantine Catholic in Denver is served by the priest of
St. Elizabeth of Hungary Catholic Church I see nothing on
their website or
their Facebook to indicate they are on different calendars so likely SS Cyril and Methodius is on the calendar the Latin Church is using.
St. Michael’s Russian Catholic Church NYC indicates
on their Facebook they had Meatfare the 12th so are on the new calendar.
Hmmm, I guess that means that my parish is alone amongst the Russians in No America as being on the old calendar for Pascha. I definitely prefer it, since we have such close ties to Orthodox parishes for other services many of us go to at those Russian Orthodox Churches.