They celebrated the Festival of Shelters according to the regulations; each day they offered the sacrifices required for that day; 1
and in addition they offered the regular sacrifices to be burned whole and those to be offered at the New Moon Festival and at all the other regular assemblies at which the Lord is worshiped, as well as all the offerings that were given to the Lord voluntarily. 2
References for Ezra 3:5
3.5 Nu 28.11--29.39.
Although the people had not yet started to rebuild the Temple, they began on the first day of the seventh month to burn sacrifices to the Lord.