Colossians

One man esteemeth one day above another: another esteemeth every day alike. Let every man be fully persuaded in his own mind.

He that regardeth the day, regardeth it unto the Lord; and he that regardeth not the day, to the Lord he doth not regard it. He that eateth, eateth to the Lord, for he giveth God thanks; and he that eateth not, to the Lord he eateth not, and giveth God thanks.

But why dost thou judge thy brother? or why dost thou set at nought thy brother? for we shall all stand before the judgment seat of Christ.

And he said unto them, The sabbath was made for man, and not man for the sabbath:

Ye observe days, and months, and times, and years.