I'm late this month, but my excuse is that I was on the road. I like to do a monthly check that my files are correctly and completely backed up, that they are organized and that I've run an actual, complete scan. Do I trust automated schedules? Most of the time, but if you are on the road and your computer hasn't been turned on 24/7, the automated scans might not have run.
So, I run a manual scan and a manual check of my patches and updates. Then I make sure I've done a backup, and I'm happy.