The 5th New Moon - Marcus Da Costa - House of Israel U.K

The Psalmist describes, the New Moon, in addition to the time appointed, and solemn feast days, as a scheduled outburst of joy for Israel through: singing; shouting; and blowing of the trumpet. This outburst of joy is a legal requirement, in combination with the observational rites of the New Moon, time appointed, and solemn feast day.