Notes about the ICALENDAR file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The ICALENDAR file type is primarily associated with 'iCalendar' by Apple Inc.. A standard way to store calendar informaiton in a text file on the Internet. The format is described in RFC 2445. The format is used by ICal on the Macintosh and in the Mozilla Calendar project. Other programs like Lotus Notes can also generate .ICS files for synchronizing calendars.
Detailed information for file extension ICALENDAR:
Mime type: text/calendarIdentifying characters
Hex: 42 45 47 49 4E 3A , ASCII: BEGIN:
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.