OPS students will go back to school a week later this fall. Omaha Public Schools will start a week later than usual this August. The school board voted unanimously Monday night to approve a 2016-17 calendar with a start date of Aug. 17 — the latest in years. The school year would end a week later, on May 26. Officials said parents and staff members supported the later start date. School for the 2015-16 year started on Aug. 12. Elementary school students will now attend school for 174 days, an increase of more than one day.