The Memorial Blowing Of Trumpets
Today is the memorial feast of trumpets. This is a holy day detailed in the book of Leviticus, 23rd chapter.
This holy day officially starts at the evening before the actual date of the holy day.
For the fall feast days, we observe the start of the biblical months at the new moon (first sliver of light [2+% luminosity]) following the fall equinox.
Leviticus 23:23-25