Generate a comprehensive calendar planning system for managing multiple businesses simultaneously.  The planner should account for different time zones, recurring tasks, deadlines, and personal appointments.  The output should be a detailed, structured plan including a weekly and monthly view, incorporating color-coding for different business priorities.  The plan should include buffer time for unexpected events and travel. Consider including features for task delegation, project milestones, and integration with existing calendar applications (e.g., Google Calendar, Outlook).  The plan must be adaptable to the varying needs of different business types and scales.  The final output should be a detailed, formatted document suitable for immediate implementation. Include specific examples of how to schedule meetings across multiple time zones, manage recurring tasks like social media posting for different brands, and allocate time for focused work blocks within each business.