God gave us certain times of the year to remember, honor, and celebrate all that He has done; is doing; and will do, through our Messiah Yeshua (Jesus).
In scripture (see beginning verses in Leviticus 23) these times are called His “appointed times”, or possibly “feasts.” Christians and the world have been calling them the “Jewish Feasts” for quite a long time, and yet God has given them to us all! (Only John in the gospel of John calls them “Jewish Feasts”. He did so for a couple reasons that I’m not going into here.)
The feasts are for remembering all that He has done, including the ‘basics’ or the ‘milk’ of Christianity. Did you know that the entire gospel is stated in two short verses (Exo. 6:6-7), and lived out through the story of the Passover, Exodus, travel to Sinai, and at Mt. Sinai?! The feasts culminate with a ‘practice celebration’ of the wedding feast of the Lamb through the feast of Tabernacles!
Nowhere in Scripture is it ever stated that these “appointed times” are done away with. Nowhere (including in the “New” Testament) is anyone ever reprimanded for observing His feasts.
Know that His Feasts (and His Law) are not required for salvation. Rather they illustrate it and fill in details, and give us practice in listening to Him!
I could try and explain them, but really, unless you simply observe them for a couple years, it will be hard to understand the beauty of what God has given us through His Appointed Times! Observing them brings wonderful depth to our relationship with our Father and Yeshua our Lord!
Shalom!