Blowing shofars was only based on the Old Testament covenant, but has been done with when Jesus Christ died on the cross, and in doing so He ended the system of law with its commandments and regulations. (See Ephesians‬ ‭2:15‬)

So, why do some Christians blow the shofar ‬‬when nowhere in the New Testament we are told to do so? Jesus didn’t blow it, nor His disciples!