1) The document provides a calendar for the 2013-2014 academic year for various levels of education in Indonesia including TK, SD, SMP, SMA, and SMK. 2) It lists the months, dates, holidays, semester breaks, national exam periods, and other important events. 3) Abbreviations used include LU (public holiday), LS (semester break), HBE (first day of school), and LR (estimated break for Ramadan and Eid al-Fitr).