Old calendar events
I was looking up something that occurred in the past (2015) and found the event. However, suddenly the calendar was wiped clean and the only thing that showed up were birthdays. I have used the Apple calendar in the past as a bit of a journal/diary of events. I would like all my old events to show up. Is there a way I can restore them and then DOWNLOAD them to make a permanent record?
macOS High Sierra (10.13.3)