With Murdy's post, it sure sounds like an announcement early next week. Pretty sure he's in the UK and said travelling tomorrow...there's no reason he couldn't do the pricking of his thumb before his flight on Friday.
But more importantly, regarding both that and the Friday the 13th announcement on a Friday, you don't announce something you're proud of and want media coverage of on a Friday.
"Releasing bad news or documents on a Friday afternoon in an attempt to avoid media scrutiny is often called a “Friday news dump” by members of the media.
This timing is often chosen strategically, aiming to minimize media coverage, public attention, and potential scrutiny that may arise from the news being released."
Now it would be cool if they did have Jason on their socials on the 13th and then made the formal announcement on the following Tuesday, but they want to MAXIMIZE the media coverage and public attention.