Mich. Comp. Laws § Article IV § 13: Legislature; time of convening, sine die adjournment, measures carried over.

Sec. 13.

The legislature shall meet at the seat of government on the second Wednesday in January of each year at twelve o'clock noon. Each regular session shall adjourn without day, on a day determined by concurrent resolution, at twelve o'clock noon. Any business, bill or joint resolution pending at the final adjournment of a regular session held in an odd numbered year shall carry over with the same status to the next regular session.