If you believe that Jesus Christ is God, then yes He is Jehovah.
Jehovah
There are no " New covenant Jehovah witnesses" Jehovah witnesses only observe the bread and wine once a year on the memorial of Christs death
You could use the word "covenant" The Old Testament was the old covenant concerning the law and the New Testament is the new covenant which explains the Grace of God to mankind in sending His only begotten Son into the world to save sinners. The old covenant is no longer in force. Jesus Christ is the way, the truth, and the life. No one comes to the Father but through Him (Jesus Christ)
No Jesus did not convert. The Old Testament tells us of a new covenant that God was giving to the Jewish people in "time to come". When Jesus (the Son of God) came to earth in human form that "time had come" Jesus simply instituted the new covenant. It was the Jewish people who failed to recognize the Messiah and follow Him into the new covenant.
God made many covenants in the Old Testament, but I assume you are speaking about the "New Covenant" vs the "Old Covenant" which God gave Israel through Moses at Mount Sinai. The "New Covenant" or second was mentioned in the Old Testament several times as a covenant which was yet future. The "New Covenant" started in the New Testament when Jesus Christ died on the cross of Calvary, was buried, and was resurrected the third day. The 'Old Covenant" was by Law and the "New Covenant" was by grace.
his covenant was to be the father of jesus
We have many beliefs...Jehovah is God Almighty and Jesus is his Son. We are Christians and we preach about Gods Kingdom like Jesus did. Jesus was a Jehovah Witness.
The new covenant was foretold through the prophet Jeremiah in the seventh century B.C.E. Jeremiah 31:31-34 says, "Look! The days are coming," declares Jehovah, "when I will make with the house of Israel and with the house of Judah a new covenant. It will not be like the covenant that I made with their forefathers on the day I took hold of their hand to lead them out of the land of Egypt, 'my covenant that they broke, although I was their true master, declares Jehovah." "For this is the covenant that I will make with the house of Israel after those days," declares Jehovah. "I will put my law within them, and their heart I will write it. And I will become their God, and they will become my people." "And they will no longer teach each one his neighbor and each one his brother, saying, 'Know Jehovah!' for they will all know me, from the least to the greatest of them," declares Jehovah. "For I will forgive their error, and I will no longer remember their sin."
Jehovah's Witnesses do no celebrate Jesus birth.
As for the old covenant we fell under the Mosiac Law and now for the new covenant we fall under the grace of our Lord and Savior Jesus Christ. Answer To get a fuller understanding of this subject, read the book of Hebrews in the Bible,it might take you an hour.... tops. It was wrote primarily to explain that very thing, and how the new covenant that replaces the old is a better permanant one that replaces a temporary one that was a foreshadow of the new one that was to come. Notice in your reading of Hebrews the key words of : better, and, covenant. It will all be spelled out to you.
The Bible is called testaments because there is 2 different testaments the new testament and the old testament the new testament is after Jesus was born and the old testament was before Jesus was born.
No Jesus and his family were Jewish