Fun fact: at my school if you come in even 1 minute late to class you get lunch detention even if your parent signs off on it being their fault
However, if you skip the WHOLE DAY you can use a parent note and have no issue whatsoever.
I've missed like 3 days of school in my 3.5 years in HS so far because of it. I was late by 15m in freshman year and went to lunch detention (alarm was set for PM and not AM, still upset about that) and thought "yeah I ain't doing this again" and will now miss the entire day instead.