προσάββατον G4315
prosábbaton · pros-ab'-bat-on · Noun Neuter
from πρό and σάββατον; a fore-sabbath, i.e. the Sabbath-eve:--day before the sabbath. Compare παρασκευή.
1 Occurrence in the King James Bible
Mark 15:42And now when the even was come, because it was the preparation, that is, the day before the sabbath,