New York City Public Schools will get two new days off in 2015, as Mayor Bill de Blasio announced the city will incorporate the Muslim holidays of Eid al-Fitr and Eid al-Adha into its academic calendar. It will be the largest US school district to do so.

De Blasio tweeted the change in policy Wednesday, calling it "a change that respects the diversity of our city." The addition of the two holidays fulfills a pledge the mayor made during his campaign to better represent New York's increasing and diverse Muslim population, the New York Times reported.

The official announcement by de Blasio and Schools Chancellor Carmen Farina came four hours later at PS/IS 30 in Brooklyn, where officials said 36 percent of students were absent the last time Eid al-Adha fell on a school day, according to WCBS.

"We're here today to make good on a promise to our Muslim brothers and sisters that a holiday of supreme importance to the Muslim community will be recognized in our school calendar so that children can honor the holiday without missing school," the mayor said.

In 2015, the holidays are celebrated in July and on September 23 to 24, respectively. New York City schools will be closed for Eid al-Adha on the 24th, while students and teachers participating in summer school will get Eid al-Fitr tentatively scheduled to begin July 17 as a designated holiday, the mayor's office said.

City officials and Muslim leaders alike cheered de Blasio's announcement.