I mean, obviously Python 2.7 is newer than Python 3.1
I remember swearing I would never migrate to python3 but here we are, I migrated without even feeling it or realizing when (But I do remember django played a big role).
Happens with the Linux kernel as well.
You shouldn’t assume anything about relative date of 2.7 and 3.1.
Minors and hotfixes allow you to release a new version for an older release (like if you released 3.7 but you found a bug present in 3.4, you can release 3.4.1 which would be newer than 3.7), making it possible to have multiple supported versions at the same time.