Hi Red and others mentioning this topic as well. Common day for BETA release is Thursday. However, sometimes the release preparation does not go well and we need to make a decission whether to release behind original schedule or wait to the next week where another release is going to happen. When we are confident enough, we do it later, when not we do not release. We are also working on improving the release process (as well as the development process as a whole) so there will be less late or no releases in the future 
Thank you for your feedback!
