You are hereUCG.org / Sermons / How Trumpets Are Used on the Holy Day How Trumpets are Used on the Holy Day Given on Sep 19, 2020 by Robert Coser Listen Downloads MP3 Audio (23.39 MB) Downloads How Trumpets Are Used on the Holy Day MP3 Audio (23.39 MB) × An overview of the trumpet as an instrument of proclamation, warning, and summons.