Do you acknowledge holidays or Holy Days

Ps 81:1 To the chief Musician upon Gittith, A Psalm of Asaph. Sing aloud unto God our strength: make a joyful noise unto the God of Jacob.
Ps 81:2 Take a psalm, and bring hither the timbrel, the pleasant harp with the psaltery.
Ps 81:3 Blow up the trumpet in the new moon, in the time appointed, on our solemn feast day.
Ps 81:4 For this was a statute for Israel, and a law of the God of Jacob.