This is the day which the LORD hath made; we will rejoice and be glad in it.
This is the day (which) the Lord hath made; we will rejoice and be glad in it - namely, the day of the feast of tabernacles, a rest to Israel through God's gift, answering to the original Sabbath rest which God appointed to commemorate the rest from creation, the type of the future "day of the Lord" (Revelation 1:10), when Israel's and the regenerated world's rest shall be, and when the antitypical feast of tabernacles shall celebrate the rest from past unrest then first enjoyed (cf. Isaiah 25:9).