Do Messianic Jews celebrate Christmas and Easter?
Generally speaking, Messianic Jews do not celebrate Christmas and Easter. There is no place in the Scriptures that commands us to celebrate the Birth or the Resurrection of the Messiah. Apparently, none of the early believers, Jewish or Gentile, celebrated these two days, as there is no mention of it in the Brit Hadasha (New Covenant).
That does not mean that Messianic Jews are against Christmas or Easter (Rom. 14). During the Christmas season we do not have Christmas trees, give gifts or have Christmas parties. Many Synagogues celebrate the Resurrection of Yeshua on on the fest of First Fruits, but not on Easter since that was added in 325 AD by Constantine. (John12:1,20 and 1Cor 15:20-23)