Charles Ellicott Commentary Ezra 3:6

"From the first day of the seventh month began they to offer burnt-offerings unto Jehovah: but the foundation of the temple of Jehovah was not yet laid." — Ezra 3:6 (ASV)

From the first day. —The notes of time demand notice. The altar was raised before the month came; from the first until the fifteenth, when the Feast of Tabernacles began, the daily sacrifice was offered. The whole verse recapitulates, and its latter part is the transition to what follows.