dschinn1001 Yea I checked my log and it's reliably showing reboots, shutdowns, even tty2 changes dating back to August of 2017 (turns out this is pretty accurate at capturing my terrible sleeping habits). Bleachbit will, to my knowledge, can nuke everything in /var/log
which obviously includes the wtmp file.
I can't really explain why it isn't showing anything between July 4th and today for you.