Here are the calendars for Dade County Public Schools 2017-2018
They include the start and end time for each day, as well as holidays and vacation days.
You can click the Google Calendar link at the bottom of each calendar to automatically connect them to your Gmail calendar on your smart phone.
Pre-K – 1st : http://rkbpta.com/calendar/schedulek1/
2nd – 8th: http://rkbpta.com/calendar/schedule28/
Events/Vacation Days: http://rkbpta.com/calendar/schedule
PTA Events: http://rkbpta.com/pta-calendar/
Dade County: http://rkbpta.com/school-calendar/