Strong's #3677: kece' (pronounced keh'-seh)

or keceh {keh'-seh}; apparently from 3680; properly, fulness or the full moon, i.e. its festival:--(time) appointed.

Brown-Driver-Briggs Hebrew Lexicon:

ּ / ּ

kese' / keseh

1) full moon

Part of Speech: noun masculine

Relation: apparently from H3680

Usage:

This word is used 2 times:

 

Psalms 81:3: "Blow up the trumpet in the new moon, in the time appointed, on our solemn feast day."
Proverbs 7:20: "him, and will come home at the day appointed."