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 .

Note: In Acts 25:17 , AV, the adverb hexes, "next, successively, in order," is translated "on (the) morrow." See NEXT.

Bibliography Information
Vines, W. E., M. A. Entry for 'Morrow'. Vine's Expository Dictionary of NT Words. https://www.studylight.org/dictionaries/eng/ved/m/morrow.html. 1940.

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Vine's Expository Dictionary of NT Words

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Morrow