1: αὔριον
(Strong's #839 — Adverb — aurion — ow'-ree-on )

an adverb denoting "tomorrow," is used (a) with this meaning in Matthew 6:30; Luke 12:28; 13:32,33; Acts 23:15 (in some mss.),20; 25:22; 1—Corinthians 15:32; James 4:13; (b) with the word hemera, "day," understood (occurring this in the papyri), translated as a noun, "(the) morrow," Matthew 6:34 (twice); Luke 10:35; Acts 4:3 (AV, "next day"); 4:5; James 4:14 .

2: ἐπαύριον
(Strong's #1887 — Adverb — epaurion — ep-ow'-ree-on )

epi, "upon," and No. 1, is used as in (b) above; the RV always translates it "on (the) morrow;" in the following the AV has "(the) next day," Matthew 27:62; John 1:29,35 ("the next day after"); 12:12; Acts 14:20; 21:8; 25:6; "(the) day following," John 1:43; 6:22; "the morrow after," Acts 10:24 .

Acts 25:17NEXT.