NET
5 One person regards one day holier than other days, and another regards them all alike. Each must be fully convinced in his own mind.
Darby
5 One man esteems day more than day; another esteems every day [alike]. Let each be fully persuaded in his own mind.
KJV
5 One man esteemeth one day above another: another esteemeth every day [alike]. Let every man be fully persuaded in his own mind.