This article describes what ICS files are and what they are used for, how to open them on different devices, and how to convert them to a more usable format so you can open them in a program like Excel.
What is an ics request? | Microsoft Outlook | Quick Tips
An ICS file is an iCalendar file. These are plain text files that contain details about calendar events, such as a description, start and end times, location, etc. The ICS format is commonly used to send meeting requests to people, but is also a popular way to subscribe to holiday or birthday calendars.
Although ICS is much more popular, iCalendar files may use the ICAL or ICELENDER file extension. iCalendar files that contain only availability information (free or busy) are saved with the IFB or IFBF file extension on Macs.
ICS files that are not iCalendar files may be IronCAD 3D drawing files or IC Recorder Sound files created with a Sony IC recorder.
