God divided Israel in to two families.. 1kings11:9-11..
The "House of Israel" which are 10 tribes..
The "House of Judah" which are the 3 tribes of Judah, Benjamin, and the Levites. These are the only ones called JEWS..
Ezekiel is speaking of a future event where Jesus will bring back all the tribes when He comes back down on the earth.. As of now, the little state of Israel consists of JEWS of those 3 tribes..
The Jews are the only tribes that kept the Sabbaths throughout the centuries. The "House of Israel" had all the Feast days and Sabbaths removed by the very first king, Jeroboam. After 200 plus years they most likely had no ideal of what these feast days were anymore..
A good example is this country (USA) we live in.. What is being taught in schools these days.. Do they teach the students anything about the Constitution.. Do they teach about our founders in a positive light or negitive.. Do they teach Godly values or everything against God.. Same with the House of Israel most likely... Dumb down..
1Kings12:26 And Jeroboam said in his heart, Now shall the kingdom return to the house of David:
27 If this people go up to do sacrifice in the house of the LORD at Jerusalem, then shall the heart of this people turn again unto their lord, even unto Rehoboam king of Judah, and they shall kill me, and go again to Rehoboam king of Judah.
28 Whereupon the king took counsel, and made two calves of gold, and said unto them, It is too much for you to go up to Jerusalem: behold thy gods, O Israel, which brought thee up out of the land of Egypt.
29 And he set the one in Bethel, and the other put he in Dan.
30 And this thing became a sin: for the people went to worship before the one, even unto Dan.
31 And he made an house of high places, and made priests of the lowest of the people, which were not of the sons of Levi.
32 And Jeroboam ordained a feast in the eighth month, on the fifteenth day of the month, like unto the feast that is in Judah, and he offered upon the altar. So did he in Bethel, sacrificing unto the calves that he had made: and he placed in Bethel the priests of the high places which he had made.
33 So he offered upon the altar which he had made in Bethel the fifteenth day of the eighth month, even in the month which he had devised of his own heart; and ordained a feast unto the children of Israel: and he offered upon the altar, and burnt incense.
Notice that Jeroboam changed all the Holy Days (Sabbaths) from what God ordained to his own days to keep the people from going down into Jerusalem.. That included the Months and Days..
Luke 21:36 Watch ye therefore, and pray always, that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man.