The office are supported the DepEd on the opening the classes.

1. The School Year 2017-2018 shall formally open on Monday, June 5, 2017 and shall end on Friday, April 6, 2018. It shall consist of 204 school days inclusive of the five-day In-Service Training and the four days for the Parent-Teacher Conferences (PTC) conducted every quarter. However, learners are expected to be in school for a total of 195 class days, as shown in Enclosure No. 1.

2. Private schools may deviate from this School Calendar. However, they may not start classes earlier than the first Monday of June and not later than the last day of August, as provided in Republic Act No. 7797 entitled An Act to Lengthen the School Calendar from Two Hundred (200) Days to Not More Than Two Hundred Twenty (220) Class Days. Said schools should notify in advance their respective regional offices (ROs) regarding any deviation from the school calendar.

3. The Implementing Guidelines on the SY 2017-2018 Calendar of Activities are provided to enable the schools to effectively and efficiently implement the school events and activities. Likewise, the guidelines shall allow the ROs and the schools division offices to provide support to schools, particularly in the areas of instruction and progress monitoring and evaluation.

4. Schools may observe national and local celebrations/activities and holidays other than those indicated in Enclosure Nos. 1 and 2, provided that the activities are beneficial to the teaching-learning process, and that the total number of class days shall not be compromised.