Hmmm...we have 0 physical calendars in the house.
I use the calendar on my phone ALL the time. I have to set reminders...mostly because I forget what day it is

I tend to set two reminders for important stuff...one the day prior as a warno...and then anywhere from 30 mins to 2 hours before an event (depends on what the event is and if driving is required).
As an Apple user, my calendar is tied to my phone, watch, computer, iPad. So the "reminder" goes off everywhere. Ha! So, yes to an electronic calendar.
I used to use planners all the time, especially when I worked. It could be perceived as disrespectful to be on one's phone...even if the purpose was to schedule something or take notes. So, old school pencil, paper, and planner it was.
I still bullet journal....but in a moleskin with dotted paper. I tend to set weekly goals...but don't really need a paper calendar anymore. Electronic
with the reminders is just what I need!