The Bible says:
Rom 14:5 One man esteemeth one day above another: another esteemeth every day alike. Let every man be fully persuaded in his own mind.
Rom 14:6 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.
There is a church in Ottawa, KS called "The End Times Church". They preach on the end times and how the Bible supports UFOs. However, the reason I am exposing this church (Ephesians 5:11) as a false church is not about the end times or UFOs (the end times are coming (I Peter 4:7 says this explicitly), as to their teaching on it, I don't know. As for UFOs, in it's literal sense, it may be possible), but rather the following teaching on the various OT feasts like the Day of Atonement, the New Moon, etc...:
"These are the true and ONLY Holidays of God and Jesus. Jesus kept them, as a sign that we as His disciples are to keep."
Thus, this church, by ignoring Romans 14:5-6 (and also Colossians 2:16-17, maybe Hebrews 4, etc.), violates Proverbs 30:6:
"Add thou not unto his words, lest he reprove thee, and thou be found a liar."