What is an ICS file format?
ICS (Internet Calendaring and Scheduling), sometimes referred to as iCalendar, is a standardized way of sharing calendar information on the internet. It allows internet users to send meeting requests and tasks to other internet users via email or calendar application. iCalendar data files need supporting software such as an email client or calendar application to be received. Users can respond to the sender easily or counter propose another meeting date/time.