Strong's G4594 — σήμερον (adverb)
semeron (say'-mer-on) adv.
1. on the (i.e. this) day (or night current or just passed)
2. (generally) now (i.e. at present, hitherto)
[neuter (as adverb) of a presumed compound of the article G3588  (t changed to s) and G2250]
KJV: this (to-)day 
Root(s): G3588, G2250 
Hebrew root: ἡμέρα
Occurrences: 41