History of the Sabbath and First Day of the Week - John N. Andrews

That from the ascension of Jesus until the day of
the Spirit's outpouring, the disciple has continued
in prayer and supplication, so that their being
convened on this day was nothing materially
different from what had been the case for the past
ten or more days. (Luke 24:49-53; Acts 1) 5. That
had the sacred writer designed to show that a
certain day of the week was honored by the events
narrated, he would doubtless have stated that fact,
and named that day. 6. That Luke was so far from
naming the day of the week that it is even now a
disputed point; eminent first-day authors[28] even
asserting that the day of Pentecost that year came
upon the seventh day. 7. That the one great event
which the Holy Spirit designed to mark was the
antitype of the feast of Pentecost; the day of the
week on which that should occur being wholly
immaterial. How widely, therefore, do those err
who reverse this order, making the day of the
week, which the Holy Spirit has not even named,
but which they assume to the first day, the thing of
chief importance, and passing in silence over that
fact which the Holy Spirit has so carefully noted,
that this event took place upon day of Pentecost.
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