Uhhh, some months have 5 Saturdays, and some have 4, guys. There's a weekly release every Saturday, and a monthly release every 1st of the month. Today's the 5th weekly release, tomorrow's the monthly. How different the last weekly is from the monthly release depends on how many days there are between them - people think the monthly is just the last weekly, but they're wrong. On a month like this, there's unlikely to be anything new between today's update and tomorrow's because... we only have part of a day to work on it. It'll probably just be bug fixes to any bugs that come up in our testing after the weekly is released.
The most minor version digit does tend to just count up with the weeklies, but it will also increment when there are hotfix releases so that we can tell if someone reports a persistent issue that they have an older, unpatched version, so x.x.xx.3 isn't necessarily the third weekly, and x.x.xx.1 could be a hotfix for the monthly release.