Feel free to consider this image:
View attachment 213115
The phrase "the Lord's day" is not the "final day" (aka Day of the Lord), as that was already addressed, way back here, near the beginning of the OP:
"... The word "κυριακη" (translit. "kuriake") is an Adjective - Dative - Singular - Feminine. This means it is being used as a 'possessive' ("of", see 1 Corinthians 11:20, "the Lord's supper"), which means the "day" in context belongs to "the Lord". It is literally "the Lord's (belonging to) day". This means, that the "day" in context is uniquely "the Lord's" out of all the 7 days of the week, for the day under consideration is that which exists within the week, as a day which repeats weekly. This is extremely important, as those who incorrectly assume it to mean "the first [day] of the week" in lieu of Jesus' resurrection, cannot get a weekly occurrence out of a one-time event, in fulfilment of typology of the Firstfruit/Wavesheaf in Leviticus 23:9-14, as made known in 1 Corinthians 15:20,23.
The two phrases are completely differing and refer to two differing things:
[1] τη κυριακη ημερα - the 7th day of the week
[2] ἡμέρα κυρίου - the final 'day' (1000 years with the Lord) of the Cosmic week
This difference is seen throughout all the OT and NT passages, in Hebrew and koine Greek.
Revelation 1:10, in its own immediate context, does not refer to John being in the final 'day', as the vision John was given encompasses much more than the final 'day'.
Age of the Earth
The Redemption of the Creation – 7000 Years And The Everlasting Gospel (Powerpoint)
7000 Year Plan Of The Everlasting Gospel – Bible & Historical Quotations (PDF)
"... The phrase “the day of the Lord” [Isaiah 2:12, 13:6,9, 34:8; Jeremiah 46:10; Lamentations 2:22; Ezekiel 13:5, 30:3; Joel 1:15, 2:1,11,31, 3:14; Amos 5:18,20; Obadiah 1:15; Zephaniah 1:7,8,14,18, 2:2,3; Zechariah 14:1; Malachi 4:5; Acts 2:20; 1 Corinthians 5:5; 2 Corinthians 1:14; 1 Thessalonians 5:2; 2 Peter 3:10]
, is a direct reference to the “thousand years” [Revelation 20:2,3,4,5,6,7, see also Isaiah 24:22, “many days”],
which is the final “day”, the 7th day – the great Sabbath, of the great week “with the Lord” [2 Peter 3:8]. ..." -
https://christianchat.com/bible-dis...on-20-and-the-1000-years.190804/#post-4188761
Feel free to consider the remaining at that link, also feel free to peruse the following:
Armageddon & The Seven Last Plagues (Powerpoint)
The Millennium & The Final Revelation (Powerpoint)