IOA Crowd Calendar in March?

[develizweb]

Looking at going to Islands of Adventure either Mon 3/4 or Tues 3/5. Undercover Tourist crowd calendar shows Mon as better than Tues but other calendars show the opposite. Tues is the only weekday that week open until 8pm instead of 7pm. Anyone know why? Is this random? We would lean towards going Tues for the extra hour but are wondering if it will be busier that day.