A crucial bug was found in v3.0.1 which caused invalid post dates to go unnoticed in the build chain until the error that popped up was unhelpful. v3.0.2 throws errors as you’d expect when there is a post like _posts/2016-22-01-future.md or a post has an invalid date like date: "tuesday" in their front matter.

This should make the experience of working with Jekyll just a little better.

Happy Jekylling!