I'm 0.4 and our weekly meeting slot is on a day that I attend so no problem there.
However, I run after school clubs on both days I am in and agreed with the head that I would run the clubs rather then attend the meetings. We are a practical dept and the one FT member of staff does not have any spare capacity after school due to other clubs and study support, so if I attended the meeting, the clubs would not run.
I catch up from my line manager instead. The World has not ended yet, so it can be done!
I also attend 0.4 of the INSETS. No issues.
Parents evenings I attend no matter what the day.
Open evenings I normally attend no matter what the day but this year couldn't due to child care as DH working away. On previous years people were always surprised when I came in. This year, because I couldn't come, of course a memo went round at short notice saying all staff had to attend, so that was a bit of an awkward email to the Head, but I was given "permission not to come in my day off, just this once"!!!!