I am baptised and confirmed Latin Catholic (I have to follow the Latin Church rules), but regularly assist at Divine Liturgy at a Byzantine Catholic Church. Interestingly the 1983 Catholic Canon specifies the holy day obligation for all the particular churches in the Catholic Church but may be overridden by the 1990 Code of Canons of Oriental Churches, or by the particular church canon, such as the Particular Law for the Byzantine-Ruthenian Church in the USA of 1999. There are nine particular churches in the United States, in addition to the Latin: Armenian, Melkite, Syriac, Maronite, Byzantine (Ruthenian), Romanian, Ukrainian, Chaldean, Syro-Malabar.
I looked up the three canon documents (Catholic, Oriental, and Byzantine) and found that in the United States, the rules are slightly different between the Latin and Byzantine Rites. The holy day is midnight-to-midnight, but may be fulfilled on the previous day starting at 4PM in the USA (per USCCB) for Latin, and from the vigil for Oriental Churches.
Catholic Canon 1248
- The precept of participating in the Mass is satisfied by assistance at a Mass which is celebrated anywhere in a Catholic rite either on the holy day or on the evening of the preceding day.
Oriental Canon 881 §2.
In order for the Christian faithful to fulfill this obligation more easily, the available time runs from the evening of the vigil until the end of the Sunday or feast day.
Below you can see a slight difference in the holy days of obligation between Latin and Byzantine.
Byzantine Canon 294
The pastor is to celebrate the Divine Liturgy for the people of the parish entrusted to him on all Sundays and days of precept. The days of precept are:
January 6 Theophany of our Lord
Ascension of our Lord
June 29 Feast of Sts. Peter and Paul
August 15 Dormition of the Mother of God (Assumption)
December 25 Nativity of our Lord
Since 1992 Canon 1246, Latin Church in the USA, observe Sunday and:
January 1 the solemnity of Mary, Mother of God
Thursday of the Sixth Week of Easter, the solemnity of the Ascension
August 15 the solemnity of the Assumption of the Blessed Virgin Mary
November 1 the solemnity of All Saints
December 8 the solemnity of the Immaculate Conception
December 25 the solemnity of the Nativity of Our Lord Jesus Christ
So a Roman Catholic could assist at Divine Liturgy on the evening before, but the converse may not work out, as 4PM Mass for a Byzantine would be too early for a Vigil (which would probably be 7PM).