To all those who like to plan early: It’s time to mark your calendars.

Prince George’s County Schools Chief Executive Officer Kevin M. Maxwell submitted the 2014-2015 school calendar to the school board for review on Thursday night. The Board of Education is scheduled to take final action on the proposed calendar on Feb. 13.

The biggest difference in Maxwell’s proposal: an extended summer vacation.

Prince George’s was one of the first school systems in the Washington region to open after the summer break.

Next school year, classes will begin on Aug. 26. This year, they started on Aug. 19.

The calendar also adds a system-wide orientation day for sixth and ninth graders on Aug. 25.

The change in school opening means classes will end later.

This year, the last day for students is June 5. The last day for teachers is June 6.

Next year, the last day for students is June 17, and teachers finish up on June 18.

Inclement weather makeup days will be June 18, 19, 22 and 23.

The calendar has also incorporated more professional development time for teachers.

On Oct. 31 and Dec. 10, students will have a two-hour early dismissal for teacher professional development. And on Jan. 26, schools will be closed to give teachers a chance to spend time grading and planning for the third quarter. This year, during the third quarter, students come to school for a half day.