Classes in public elementary, high schools begin on June 4
While it has yet to release its official school calendar for SY 2018-2019, DepEd said the opening of classes in public schools nationwide is scheduled on the first week of June, which falls on June 4 this year. (READ FROM SOURCE)
As per DepEd, school opening in private schools can be rescheduled given that it will not be set later than August 4.