I have 3 calenders lol would make much more sense to just have 1.
(Work calendar is outlook, personal is Google, and a physical 1 on the wall in kitchen lol !!)
I use the Calendar application on my iPhone since it's the most convenient. As for wall calendars, I have one since my family receives them every year along with the newspaper.
I personally store a calendar in my mind, which works well if you have a daily routine. However, I may sometimes use an application if there are events I might otherwise forget.
