For RTU, Public and Private Elementary & Secondary Schools:3097. DO MEMO NO. 17, 2016. OPLAN BALIK TASK FORCE AND SCHOOL CALENDAR FOR SCHOOL YEAR 2016-2017 Posted on April 27, 2016 by marksherwinmagsombol Leave a comment 3097. DO MEMO NO. 17, 2016. OPLAN BALIK TASK FORCE AND SCHOOL CALENDAR FOR SCHOOL YEAR 2016-2017 Memorandum