ALBANY, N.Y.

Sikh, Muslim, Buddhist, Jewish, Hindu and Christian — each faith has its holy days. Schools across the country are asking how to respect them all.

Consider the University at Albany, which canceled classes on major Muslim holidays. Faculty wanted the move out of concern for Muslim students after the Sept. 11 attacks. But then came the questions: What about Hindus? Buddhists?

President Kermit Hall decided last fall to return to the original calendar.

“Can you operate a university and give each religious group an accommodation? I think the answer is, ‘No,’” he says.

Make that “maybe.” School administrators across the country are rethinking their calendars as their student bodies become more diverse.

In May, Muslim parents asked New York City’s education department for days off on two major Islamic holidays, which some districts in Michigan and New Jersey already have granted. In January, a Long Island mosque petitioned New York Gov. George Pataki to consider the holidays when scheduling mandatory statewide testing. Last month, the state Legislature passed a bill that would take all religious holidays into account when scheduling the mandatory tests. The Council on American-Islamic Relations called it the first step toward recognizing Muslim holidays in public schools.

But also last month, despite a Muslim group’s lobbying at every board meeting, the Baltimore County district in Maryland approved a calendar with a day off for the Jewish holiday Rosh Hashana, but none for Muslim holidays. The group had hoped the district’s growing diversity — 47.8 percent of students last year were minorities — would be persuasive.

“Either I go against my faith, or I miss my schoolwork and have imperfect attendance,” says 15-year-old Kanwal Rehman, who will enter 10th grade in Baltimore this fall. In January, her midterm exams fell during Eid al-Adha, one of the two most important holidays in Islam.