To share an event, tap the event to open the detail view, then press the share button. 

You will see the following option:

  • CalShare, creates a link that self-contains all event details. aCalendar can import events from this link offline, opening the link gives you event details in a web browser including ICS download option
  • Text, just the event details in text format
  • File, ICS file to share, e.g. via email 
  • File (Messenger), ICS file to share via WhatsApp, etc
  • QR code, to be scanned with any good QR/Barcode scanner

When you regularly share events with the same person(s), also have a look at sharing of calendars.