spring break

Why do different schools have different spring breaks. Almost all universities unanimously decide that spring break should be a full week of vacation, but different schools often choose different weeks. It would be so much more beneficial to have a certain date designated as spring break for the entire state.
I was home for spring break this past week and I didn't have any big plans. Some students take family trips to Florida or other vacation spots, but I wasn't in th this situation. My only plans for spring break were to stay at home and hang out with old friends from high school. The only problem is that many universities do not have the same week for spring break as Concordia. Therefore only a few of my friends were home, sharing the same spring break as me, while others were still at school.
Would it be a bad thing to give all students throughout the state the same week of spring break? I can't think of any negative affects of having a designated week for spring break. This would only have positive results: Students could see nearly all of their friends, no one would have to miss school for vacationing with another who has a different spring break, and there wouldn't be complaints about unfair vacation times.
If spring break was the same date for all universities in the state, many positive things would come about. Students wouldn't miss out on seeing there friends that have a different week of spring break. Also making plans would beecome much easier for families with students in multiple universities. Overall, having a statewide week designated to spring break would only bring positive benefits