3 The people of the land shall worship at the door of that gate before Yahweh on the Sabbaths and on the new moons.
*Minor differences ignored. Grouped by changes, with first version listed as example.
At the door of this gate - In Herod's Temple the place for worshipping "before the Lord" was the court of Israel, west of the court of Women, separated from the inner court by a low parapet. In Ezekiel's the worshippers were admitted into the inner court itself. The upper pavement (E. Plan II) on either side of the eastern gate provided room for such worshippers.
Likewise the people of the land shall worship at the door of this gate before the Lord,.... Publicly, and in a spiritual manner; attending the ministration of the word and ordinances with constancy and fervency; praying to God, praising his name, and hearing his word with attention; and performing all the duties of religious worship. The allusion is to the people of Israel meeting at the door of the tabernacle of the congregation, Exodus 29:42, "in the sabbaths, and in the new moons"; at their stated weekly and monthly meetings; see Isaiah 66:23.
In the sabbaths - Both weekly and other holy days, which are called sabbaths.
*More commentary available at chapter level.