5 One man esteemeth one day above another: another esteemeth every day alike. Let every man be fully persuaded  in his own mind.
5 One person considers one day more sacred than another; another considers every day alike. Each of them should be fully convinced in their own mind.
5 One person esteems one day as better than another, while another esteems all days alike. Each one should be fully convinced in his own mind.
5 Or, say, one person thinks that some days should be set aside as holy and another thinks that each day is pretty much like any other. There are good reasons either way. So, each person is free to follow the convictions of conscience.
5 One person esteems one day above another; another esteems every day alike. Let each be fully convinced in his own mind.
5 In the same way, some think one day is more holy than another day, while others think every day is alike. You should each be fully convinced that whichever day you choose is acceptable.
Matthew Henry's Commentary on Romans 14:5
Commentary on Romans 14:1-6
(Read Romans 14:1-6)
Differences of opinion prevailed even among the immediate followers of Christ and their disciples. Nor did St. Paul attempt to end them. Compelled assent to any doctrine, or conformity to outward observances without being convinced, would be hypocritical and of no avail. Attempts for producing absolute oneness of mind among Christians would be useless. Let not Christian fellowship be disturbed with strifes of words. It will be good for us to ask ourselves, when tempted to disdain and blame our brethren; Has not God owned them? and if he has, dare I disown them? Let not the Christian who uses his liberty, despise his weak brother as ignorant and superstitious. Let not the scrupulous believer find fault with his brother, for God accepted him, without regarding the distinctions of meats. We usurp the place of God, when we take upon us thus to judge the thoughts and intentions of others, which are out of our view. The case as to the observance of days was much the same. Those who knew that all these things were done away by Christ's coming, took no notice of the festivals of the Jews. But it is not enough that our consciences consent to what we do; it is necessary that it be certified from the word of God. Take heed of acting against a doubting conscience. We are all apt to make our own views the standard of truth, to deem things certain which to others appear doubtful. Thus Christians often despise or condemn each other, about doubtful matters of no moment. A thankful regard to God, the Author and Giver of all our mercies, sanctifies and sweetens them.