How long is the Republican National Convention?

From July 15 - 18, approximately 50,000 Republican state delegates, guests, and media members will be in Milwaukee for the Republican National Convention, according to the Host Committee responsible for coordinating the four-day event.
So far, the convention has focused on the economy, crime, and unity. Tonight's speaker line-up will give remarks under the theme of "Make America Strong Once Again."
Senator JD Vance of Ohio, now the GOP vice president nominee, is due to take center stage in Milwaukee, where Republicans have sought to display party unity to contrast with the Democratic infighting. His speech will likely be the four-day convention's most-watched moment before Trump, 78, speaks on Thursday night.
After the convention comes to a close, the former president and his new running mate will rally in Michigan on Saturday, July 20. And next month, Democrats will gather at their convention in Chicago from August 19 to 22.