We’re going to have Matins for the Cross on Sunday after coffee hour, and Divine Liturgy on Monday morning.
In our OCA parishes, it is usually the Priest who moves feasts, not Bishops or Archbishops. I don’t think that I remember seeing any translation of Feasts in the Serbian Orthodox Church.
Translating the Feast of the Cross to Sunday can raise havoc as to when to fast. Having Matins on Sunday potentially can as well, but I’m planning to fast from midnight to sundown (except for Communion) on Monday anyway. (I’m self-employed, which helps.)
I remember several sticky Old vs. New Calendar situations with the Feast of the Cross in recent years—we Serbian Orthodox (and Russian Orthodox) dual-parish folks in the OCA are the only ones who have such issues. These issues must be handled with Grace, and with the advice of our Priests.
The AOA does not dictate that the Feast be moved; it merely gives Priests the discretion to do so.
The normal pattern for weekday feasts in the AOA is to have Vespers followed by Divine Liturgy on the day preceding. That works out fine if the Feast falls on a Tuesday through Saturday; but Monday Feasts are problematic. Yes, the Feast is a different liturgy and a different liturgical day than Sunday; but there could nevertheless be confusion in the minds of some of why the “one liturgy, one altar, one day” rule has been seemingly violated.
So the solution to the “Monday problem” has been to allow parishes the option of melding the Feast with the Sunday liturgy. We did that twice earlier this year with the Presentation of the Lord and with Saints Peter and Paul.