On May 16, the Washington, D.C. city council passed B22-0284. It moves the non-presidential primary from September to the third Tuesday in June. This doesn’t really represent a change, because the 2016 primary for president and all other office was held in June. But the existing law (before this bill passed) had said that, starting in 2018, that primary would move to September. The Mayor hasn’t signed the bill yet, but is expected to sign it.
Unlike the pending New York bill to move the primary, the District of Columbia bill does not alter or disturb the petition deadline for independent candidates, which will continue to be in August. Thanks to Electionline for the news about the D.C. bill.