|Noah Webster's Dictionary|
1. (n.) A religious festival.
2. (n.) A secular festival; a holiday.
Int. Standard Bible Encyclopedia
ho'-li-da: This word occurs twice in the King James Version, namely, Psalm 42:4, "a multitude that kept (the Revised Version (British and American) "keeping") holyday," and Colossians 2:16. In the latter case it is a rendering of the Greek word heorte, the ordinary term for a religious festival. the Revised Version (British and American) translates "feast day." In the former instance "keeping holyday" renders choghegh. The verb means to "make a pilgrimage," or "keep a religious festival." Occasionally the idea of merrymaking prevails, as in 1 Samuel 30:16 -"eating and drinking," and enjoying themselves merrily. The Psalmist (who was perhaps an exiled priest) remembers with poignant regret how he used to lead religious processions on festival occasions.
Holyday (2 Occurrences)
Colossians 2:16 Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days: (KJV)
Psalms 42:4 When I remember these things, I pour out my soul in me: for I had gone with the multitude, I went with them to the house of God, with the voice of joy and praise, with a multitude that kept holyday. (KJV JPS ASV)