πεντηκοστὴ ἡμέρα

[Anzeigenhauptmeister]

It is the seventh Sunday after Easter, or the fiftieth day after Easter Sunday, which commemorates the descent of the Holy Spirit upon Christ's disciples.

Do the terms Whitsun and Pentecost only refer to this Sunday, or is this the net Monday included in this terminology?
I just know that the term Whitsuntide denotes the whole week after Whitsun, including Whit Friday.

Did you know that there are not only two islands called Christmas Island and Easter Island, but also an archipelago called Whitsunday Islands? They belong to the same country as Christmas Island.

[Associate Justice PiT]

     We call it Pentecost, and I have never heard of Whitsun. In the Orthodox Church Monday is formally a separate observance called the Day of the Holy Spirit, but we also are liturgically in the feast of Pentecost all week, during which time its hymns dominate the services that one attends.

[Anzeigenhauptmeister]

I have never heard of Whitsun.

That terminology seems to be British English.
You live in Colombia?

[Associate Justice PiT]

I have never heard of Whitsun.

That terminology seems to be British English.
You live in Colombia?

     No, I live in America. I just have the avatar because my wife is from there.

[Okay, maybe Mike Johnson is a competent parliamentarian.]

I have never heard of Whitsun.

That terminology seems to be British English.

Older liturgical books and hymnals from the Episcopal Church and other "WASPy" Protestant churches in the United States also use it, but these days "Pentecost" is the overwhelmingly more common term even in those denominations.