I plan my life out very carefully, so when it comes to the launch date, I looked at my classes and when I would have the most free time to dedicate to the business to ensure the launch goes as best as it can. It could be very overwhelming, but luckily my parents are both retired and are willing to help me out as much as they can.
College classes lay out deadlines rather well. Heck, they give you all the deadlines before the school year even starts on the class syllabus. This is extremely convenient for someone who like set deadlines and getting their work done early. Unfortunately, running a business isn't quite like that.