There are many dates and deadlines that you as a graduate student need to meet. Please visit the list of links below for specific information.

Academic calendars for current and future academic years (fall, spring, and summer semesters)
Deadlines for theses, dissertations, DMA performances, and DNP final oral presentations only. Students writing master's papers should contact his/her programs for deadlines.
Graduate Assistants pay dates are the last work day of each month during the assistantship.
Calendar of important dates