VCS (vCalendar Event File)
The VCS Data file format
VCS files are associated with a number of digital calendars. It contains event information or details and date of an appointment. The VCS file can be used to import dates and notes into a scheduling program or calendar. The information contained in the file includes the date, time, possible repetition, and any comments saved alongside with the appointment or event.
Technical details of VCS files
A big perk of VCS files is that they are very versatile. They can be imported into and exported from a number of calendars such as the one included in Microsoft Outlook or the Apple native calendar. Many PDA programs and apps also support VCS files, such as the Palm Desktop. It can even be used by the Google Calendar.