Two calendar groups
There are events that involve you directly, and then there are events you just need to be ambiently aware of, like when your partner is busy or your kid has a half day at school. PiCal lets you organize calendars into two groups: a primary outer ring, and a secondary inner ring. Put your personal and work calendars in the outer one, and everything else in the inner one. Now you can see both where you need to be when, while knowing what everyone else is up to.