'The first resurrection,' mentioned in Revelation 20:5, 6, does not mean a first resurrection, but the essence and primary part of resurrection, which is salvation and eternal life. There is only one resurrection to life. A second does not happen, and is not mentioned anywhere in the Bible.

(Verweise: Apocalypse Explained 6; Apocalypse Revealed 851; Revelation 20:5-6)

26. Verse 8 And there was evening, and there was morning, a second day.

What 'evening', 'morning', and 'day' mean, has been shown already at verse 5.