What extension does a calendar file have?

Answer by  MikeG (1650)

This depends on which program you are referring too. You should be able to identify this by saving it directly to the desktop, right click it and pull up the properties, this will pull up any extensions associated to that specific file format. From here you can simply google it and pull up any other info you require.

Answer by  Quual (161)

Outlook calendar file .ICS Lotus Organizer calendar file They are others, your question need to indicate from which program.