It isn’t uncommon for marketers to believe content calendars and editorial calendars are interchangeable phrases. However, they each serve a different purpose within your content strategy.
Differences Between Content Calendars and Editorial Calendars
The best way to define the difference between the two is to remember that your editorial calendar is part of your content marketing strategy – and that your content marketing strategy involves MORE than developing an editorial calendar.
Source: Editorial Calendar vs. a Content Strategy – What’s the Difference? – nDash.com