Found 4 Strong's definitions.

1. 1

   G4594: σήμερον (sḗmeron)

   neuter (as adverb) of a presumed compound of the article ὁ (t changed to s) and ἡμέρα; on the (i.e. this) day (or night current or just passed); generally, now (i.e. at present, hitherto):--this (to-)day.

   100%
2. 2

   G5504: χθές (chthés)

   of uncertain derivation; "yesterday"; by extension, in time past or hitherto:--yesterday.

   2%
3. 3

   G839: αὔριον (aúrion)

   from a derivative of the same as ἀήρ (meaning a breeze, i.e. the morning air); properly, fresh, i.e. (adverb with ellipsis of ἡμέρα) to-morrow:--(to-)morrow, next day.

   2%
4. 4

   G2250: ἡμέρα (hēméra)

   feminine (with ὥρα implied) of a derivative of (to sit; akin to the base of ἑδραῖος) meaning tame, i.e. gentle; day, i.e. (literally) the time space between dawn and dark, or the whole 24 hours (but several days were usually reckoned by the Jews as inclusive of the parts of both extremes); figuratively, a period (always defined more or less clearly by the context):--age, + alway, (mid-)day (by day, (-ly)), + for ever, judgment, (day) time, while, years.

   2%