It is also known as Rosh Hashanah. It is a Feast for which one does not know September 8th at evening is the beginning of the
shalom b'SHEM Yah'shua HaMashiach
YHvH commanded Feast of Trumpets.
Trumpets are sounded for thirty days
in the run up to the Feast.
It is when the Last Trumpet is sounded.
the day nor hour as it begins at the new moon.
That is not until the new moon is sighted.
Thank you!! Blessings!