City parents are raising concerns over next year’s public school calendar, which delays classes until the second week of September. The first day of school this fall will be Thursday, Sept. 10, extending this year’s summer break to approximately 11 weeks, which is up from about nine weeks last year. Yiatin Chu, co-president of Parent Leaders for Accelerated Curriculum and Education, joined “The Rush Hour” on Thursday to talk about the new calendar. Tap the video player above to watch the interview.