Sunsama now lets you define working hours on a per-channel basis. This lets you tell Sunsama's auto-scheduler exactly when you want to work on certain things.
How to use it:
  1. Head to your schedules tab (main dropdown)
  2. Set up schedules for your channels and contexts
  3. When planning your day, hit "X" on a task to have it auto-scheduled based on it's channel's schedule!