Illustration showing the difference between an iCal standard and an ICS file used in calendar applications like Outlook, Google Calendar, and Apple Calendar.
What is an iCal File and How It Differs from ICS Files

An iCal file is a digital calendar format used to share event information across platforms and devices. Often saved with a .ics extension, iCal files allow users to import or subscribe to events in calendar applications like Google Calendar, Outlook, and Apple Calendar. While “iCal” and “ICS” are often used interchangeably, iCal refers to the