"If I am reading things here correctly, this schedule runs from the early AM hours of Mar 1 through the entire day and also includes some movements in the early AM hours of Mar 2,right?"
Yes, correct. All activity that a crew did is recorded on the sheet for the day that they went on duty. So, for example if a crew is called for 11:50 PM at Alamosa on March 1 and departed 12:30 AM March 2, all entries pertaining to that run will be recorded on March 1. Part of the reason is for record keeping purposes. The crew is considered to have worked on, and will be paid for, March 1. When they completed their time slips it would have been with the date of March 1.
Jimmy