STS-121 Mission Timeline

If there are only 2 spacewalks [Flight Day from 1 to 13]If there are 3 spacewalks [Flight Day from 8 to 14]Flight days 1 to 7 would remain the same, but activities on the following days would change.Flight Day 1 Launch of Space Shuttle Discovery at 2:38 p.m., EDTPayload bay door is openedKU band antenna is deployedThe crew powers up CanadarmThe crew plays back