Psalms 75:2

When I shall receive the congregation I will judge uprightly.

When the congregation is received, upright judgment is rendered, and that standard requires the Sabbath to be kept with reverence. Profaning the day by making it an occasion for public display violates that uprightness. Gala spectacles and vain parades have no place in its observance, since they turn a holy convocation into a scene of outward show.