Some honor God one day, some another, some everyday is the Sabbath.Yes it does, and Jesus opened up the full meaning of it when'd He proclaimed , "He IS the Lord of the Sabbathâ.
In Him is our rest, so we look to Jesus. I can worship through Him, not through a day, not through a Month of the year, not through a season of the year, not through the sun, not through a new Moon, nor a Full Moon. Through Jesus, and only Jesus is how I reach the father, and I can do that at any hour or any day.
"Lord of the Sabbath". Not lord of the first day of the week. Not lord of just any day of the week. Lord of the Sabbath to show He is connected to that day of rest. He is the rest. And what day do we rest? Because The Lord God declared six days shalt thou labor but rest on the seventh. If you come to Jesus to rest in Him, you do so on His terms, not yours.
Yes you can pray to Him any day of the week. But the seventh belongs to Him. That is the day he wished you to devote to communing with Him without distractions of day to day work. That is His desire but you can do it your way.