Marketo released the new Calendar functionality for their platform. We’re very enthusiastic about this. Marketo even included a quote from Diederik Martens on their blog.

“When you’re planning a campaign, it’s difficult not to interfere with other campaigns in a way that degrades results and the overall customer experience. Marketo’s Marketing Calendar gives you visibility across campaigns at the time you’re planning or rescheduling a single campaign, so you can avoid these mistakes. Even though the Calendar has many nifty tricks, I personally think this is by far the best feature, looking at ROI.”

http://blog.marketo.com/2014/09/introducing-the-marketo-marketing-calendar.html