Both of the new moons. — And of the new moons. The whole verse is general and anticipatory. The new moons, the three feasts, and the constant presentation of freewill offerings, added to the daily sacrifice, made up the essentials of ritual; all being, like the arrangements in the Book of Leviticus, fixed before the Temple was built, and afterwards observed.
Related Commentaries of Ezra 3:5
Ezra 3:5
5 And afterward offered the continual burnt offering, both of the new moons, and of all the set feasts of the LORD that were consecrated, and of every one that willingly offered a freewill offering unto the LORD.