A computer implemented method for integrating a calendar and task scheduler to enable automatic scheduling of meetings and assignment of tasks based on priority. With the illustrative embodiments, a task in a user's calendaring system may be split into multiple time blocks, and each time block for the task may then be scheduled around meetings in a user's calendar. Tasks that are scheduled in the user's calendar may also be automatically rescheduled when meetings within the user's calendar change. Tasks may be scheduled over lower priority meetings in the user's calendar as needed in order to meet the due dates assigned to the tasks. The illustrative embodiments also allow for automatically adjusting meeting or task priorities based on policies, and identifying classes of activities that may be performed concurrently.