Depends on the parish culture. I know for us, we truncated our divine liturgy for Pascha Sunday. We had mainly matins, on that day; and utilized pretty much the second portion of the Divine Liturgy, for that day. it could have easily lasted an additional half hour, to an hour, if we didn’t consolidate the services.
Vespers on their own, depending on how it’s executed by priest, and choir, may take between 30 minutes, to an hour. Divine Liturgy, depending on the execution and chosen hymns, an hour, to an hour and a half.
Even as low as 2 hours done in entirety, if the priest and cantors chant fairly quickly, and the entrance processions are kept near the front of the narthex.
So much depends upon the parish and the celebrant(s) and cantors.
Also varies by Church Sui Iuris, due to different rubrics in the liturgical books.
On Saturday evening (9 PM which later than the time for vespers). We took one hour for the Matins and one hour for the Divine Liturgy of St. John Chrysostom. After that we had the blessing of foods for Pascha. So it was about 2.5 hours total.
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