The word Sabbaton has two meanings:
The evidence for this conclusion is these sites
When you go through these scriptures,
Matt 28:1, Mark 16:1-2, Mark 16:9, Luke 18:12, John 20:1, 20:19, Acts 20:7, 1 Co 16:2,
Matt 28:1, Mark 16:1-2, John 20:1, John 20:19, Mark 16:9, 1 Co 16:2
mian sabbaton, mia ton sabbaton, mia sabbaton, mian sabbatou
in English is used with the meaning the first day of the week
sabbatou is used twice with the meaning week
In Genesis God uses evening and morning the first day.
Interesting is the word in Leviticus 23 about the first day in the week .