Acts 2:1

When the day of Pentecost came, they were all together in one place.

Note That is, Shavuot, the late spring feast of pilgrimage to Jerusalem; it is also known as the Feast of Harvest (see Exodus 23:16) or the Feast of Weeks (see Exodus 34:22).

And when the day of Pentecost was fully come, they were all with one accord in one place.

Now when the day of Pentecost had come, they were all with one accord in one place.

And when the day of Pentecost was now come, they were all together in one place.