pentekoste identifies a day used as the endpoint or setting for events in the cited passages.

The attested form identifies a particular day as a temporal marker: it sets the limit of a stay, a hoped-for arrival date, and the setting in which a group is together.

1. A named day as a temporal marker · dominant

   All three occurrences use the genitive singular feminine form in temporal clauses. In 1 Corinthians 16:8 the APB renders a continued stay "until Pentecost"; in Acts 20:16 it renders an effort to reach Jerusalem "by the day of Pentecost"; and in Acts 2:1 it renders the day as being fulfilled while all were together in one place.

   1 Corinthians 16:8Acts 20:16Acts 2:1

In the Anselm Project Bible: The APB presents the term as "Pentecost" in each cited verse, with temporal phrasing such as "until Pentecost," "by the day of Pentecost," and "the day of Pentecost." These phrases confirm the verses' temporal setting rather than isolate a precise English equivalent.