TX HB604

Changes the earliest allowed first day of school for Texas public school students from the fourth Monday in August to the first Monday in September

Districts operating year-round school systems may still begin instruction before the first Monday in September

Large districts (190,000+ students) may begin as early as the third Monday in August at up to 20% of campuses if those campuses are undergoing comprehensive reform and serve a majority of educationally disadvantaged students

Prevents "districts of innovation" from using local innovation plans to exempt themselves from the first day of instruction requirements

Takes effect September 1, 2025, with the new school start date requirements applying beginning with the 2026-2027 school year