Polls close at 11 p.m. Eastern time. In the 2022 state primaries, first results were reported 11 minutes later, and the last update of the night was at 6:10 a.m. Eastern time with 48 percent of votes reported.
All active registered voters were mailed a ballot, which must be postmarked by Election Day and received by March 12. Early in-person voting was also available.
California is one of five states on Tuesday holding primaries for the presidential race as well as its state primary. In state and congressional primaries, candidates from all parties are listed on one ballot, and the top two vote-getters advance to the general election. In the presidential primary, Republican voters were required to be registered with their party to vote for its nominee, but Democrats and unaffiliated voters could participate in the Democratic election.
Source: Elections - nytimes.com