TP is based on historical data until WDW releases official information.
MNSSHP typically occurs Sunday, Tuesday, Thursday, and Friday. August has reduced parties so Tuesday and Friday falls in line with what happened in 2024. It will change with holidays like Labor Day, Columbus Day, Halloween, etc. TP will email you as soon as there is a change to the official WDW calendar confirming the special ticketed event or increased/decreased park hours.