Blocking time on your calendar

I’ve seen lots of mention of blocking off time on calendars from MWFM and would love to know what are you labeling those as? My calendar might only show “Busy/Free” but I’m sure my (micro)manager would ask at some point what meeting I have that conflicts with another. Some context is that I’m starting a new job and putting my daughter in daycare part-time and hoping to wing it a couple days a week.