High schools in the United States do not typically receive a break for the Mid-Autumn Festival due to the country's predominantly secular school calendar and the lack of widespread recognition of the holiday. The Mid-Autumn Festival, which is a significant cultural celebration in many Asian countries, is not a public holiday in the U.S., and as such, it is not integrated into the school schedule.

The U.S. school calendar is primarily driven by the need to provide a consistent educational experience across the nation, with holidays and breaks aligned with major secular events such as Thanksgiving, Christmas, and spring break. The Mid-Autumn Festival does not align with these secular holidays and is not recognized as a national or federal holiday. This means that schools do not automatically close for the celebration, and students are expected to attend classes.

Data from the National Center for Education Statistics (NCES) shows that the majority of U.S. public schools operate on a traditional calendar with a fixed number of days for instruction and a set of holidays that are universally observed. For example, in the 2019-2020 school year, the average public school calendar included 180 days of instruction and 10 holidays, which were primarily secular in nature. The Mid-Autumn Festival was not among these holidays.

Additionally, the cultural diversity of the U.S. is not reflected in the school calendar in the same way that it is in other countries. While the U.S. is home to a large and diverse population, including many Asian Americans, the celebration of cultural holidays is not uniformly recognized across all schools. This is due to a variety of factors, including the decentralized nature of the U.S. education system, where individual school districts have the autonomy to determine their own calendars and holidays.

In conclusion, high schools in the United States do not get a break for the Mid-Autumn Festival due to the secular nature of the school calendar and the lack of national recognition of the holiday. The educational system's focus on providing a consistent and secular experience for all students means that cultural holidays like the Mid-Autumn Festival are not integrated into the school schedule.