cheerfulness

noun

1. (uncountable, usually)The state of being cheerful; joy.

   “Or he that exhorteth, on exhortation: he that giueth, let him doe it with simplicitie: hee that ruleth, with diligence: hee that sheweth mercy, with cheerefulnesse.”

   “The banded ones were all dressed in white gowns - a gay survival from Old Style days, when cheerfulness and May-time were synonyms - days before the habit of taking long views had reduced emotions to a monotonous average.”