Polls close at 8 p.m. local time. Most of the state observes Eastern time, but in the handful of counties that use Central time, polls close at 9 p.m. Eastern. In the 2020 primaries, the first votes were reported soon after polls closed, and nearly all votes were reported by 4 a.m. Eastern.
All Michigan voters were eligible to vote by mail, and ballots were due by 8 p.m. on Election Day. In-person early voting was offered over a nine-day period, ending on Sunday. There is no registration by party in Michigan, but voters could only vote in one party’s election. As of Monday, more than one million voters had already cast a ballot in either the Republican or the Democratic primary.
Source: Elections - nytimes.com
