when was the shofar blown in the bible
The shofar was used to announce holidays and the Jubilee year. The first day of the seventh month (Tishrei) is termed "a memorial of blowing", or "a day of blowing", the shofar. They were used for signifying the start of a war. Later, it was also employed in processions, as musical accompaniment and eventually it was inserted into the temple orchestra by David. Note that the' trumpets' described in Numbers 10 are a different instrument, described by the Hebrew word' trumpet' (Hebrew: חצוצרה ‎ ‎; ḥaṣoṣrah), not the word for shofar (Hebrew: שופר ‎ ‎).