Not long ago, the EBU had already published a schedule for the two Eurovision weeks but with Russia withdrawing a new timetable was needed.
The new second version was published recently and can be found in a neat schedule, courtesy of the EBU: Eurovision Song Contest 2017 schedule

This year the rehearsals start on Sunday the 30th of April. The artists are obliged to wear their full stage costume on the first rehearsal already. The first rehearsals will be 30 minutes long, the second ones 20 mintues and after each individual rehearsal there is a press conference solely for the competing country in question. These press conference will also last for 20 minutes.

Details about the red carpet ceremony on Sunday the 7th of May will be released later.