Instead of individually having to click on each episode then, 'watched'.
And to marked them as acquired.
But David already answer that one on another thread :
"Marking as watched from the calendar won't be part of this feature, though it would be done if & when we get to this pending feature: http://www.tvmaze.com/threads/289/one-week-calendar-with-more-details"
Go see http://www.tvmaze.com/threads/1518/acquired-vs-wat... for more details
Yep, if you want to see this feature, please vote for http://www.tvmaze.com/threads/289/one-week-calendar-with-more-details :)