Ezekiel 45:17

In return for these dues paid him by the people the prince shall be charged with providing the sacrifices for public worship.

he shall prepare provide.

The "feasts" were the three great festivals, passover or unleavened bread (easter), the feast of weeks, or pentecost, and the feast of ingathering or tabernacles at the end of the vintage. Ezekiel, however, seems to give no place to pentecost.

all solemnities i.e. stated seasons. A reconciling or "atoning" efficacy appears attributed by the prophet to all the various kinds of sacrifices.