Thanks. So how do you prepare during Advent? Do you fast and pray often? Or do you live like any other day? Should you always have the Nativity, and The Lord close to your heart?
It is the custom in Byzantine Churches, Catholic and Orthodox, to fast and abstain for the 40 days before Nativity according to one’s strength. The exact details vary from place to place, but all agree it is NOT as strict as that of Great Lent, except on Wednesdays, Fridays, and the last few days, starting on 20 December.
I would guess that other Eastern Churches have comparable customs.
In the Slavic traditions (which many Orthodox in the USA observe, regardless of their ethnic background), Christmas Eve is a day of strict fasting, with nothing but water, and maybe a little bit of bread, taken. When the first star comes out, the Holy Supper, aka Shepherd’s Supper is eaten. This consists of 12 strict vegetarian dishes for the 12 Apostles. Some say fish is permitted, some disagree.
About the services leading up to the Nativity:
Advent is not as liturgically developed. There are little hints and occasional stichera scattered throughout the 40 days. The last two Sundays have their own special commemorations of the Holy Fathers and then the Geneology of Christ.
Starting on 20 December, the Divine Office is modelled after that of Holy Week, with some of the same hymns sung.
The full parochial observance on Christmas Eve usually consists of the Royal Hours celebrated in the morning. The Little Hours of Prime, Terce, Sext, and None are expanded with special hymns and readings. A Vesperal Divine Liturgy (usually completed by 1 pm) follows, with many lessons, culminating with the Nativity according to St. Luke. This parallels the Vesperal Liturgy on Holy Saturday.
Vigil (usually Great Compline and Matins) starts any convenient time of night. At Matins, the Nativity according to St. Luke.
The Christmas Liturgy is technically celebrated in the day, but some places do it at midnight after the Vigil. The Gospel is that of the Adoration of the Magi.