At 12:31 a.m. PDT on Monday, April 19th, the Linux-powered Mars helicopter will take its first flight, which will also be the first powered, controlled flight done on another planet. An official stream for live updates is below. The stream will start at 3:15 a.m. PDT (6:15 a.m. EDT/10:15 a.m. UTC) as there will be a delay for the data to arrive.
More from their official announcement here:
"At 12:31 a.m. PDT on Monday, April 19, 2021, the Ingenuity helicopter team is going to attempt the first ever powered, controlled flight on another planet."