No its not, they just did Quali 1 early (thursday). Here's the rest of the sched...

Saturday - May 31
15:00-15:45 Saturday Free Practice Session 1
16:15-17:00 Saturday Free Practice Session 2
19:30-19:45 Warm-Up Session
20:00-21:00 Qualifying Session 2

Sunday - June 1
20:00-22:00 Race: Monaco Grand Prix