Combining ICS feeds for Availability Calendar

Importing ICS to create a combined ICS for Availability Calendar Combining ICS feeds for Availability Calendar I need to have a script (preferably Java) that will use individual ICS calendars feed that format and margin appointments together by calendar group ( may have two ICS feeds per feed) and output a new ICS calendar link. I will also need to display multiple formatted ICS links in into one combined availability calendar and output a new combined ICS calendar link. ICS link samples: First ICS for group   BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:-//[login to view URL], Inc.//EN BEGIN:VEVENT UID:3d61f25d-cf8d-419e-a1d6-8e7e1d29d8bb DTSTAMP:20180424T184453Z DTSTART;VALUE=DATE:20141127 DTEND;VALUE=DATE:20141130 SUMMARY:Reserved - XXXXX XXXX LOCATION: The Boardwalk # 182:___ END:VEVENT  PRODID:-//[login to view URL], Inc.//EN BEGIN:VEVENT UID:3d61f25d-cf8d-419e-a1d6-8e7e1d29d8bb DTSTAMP:20180424T184453Z DTSTART;VALUE=DATE:20140127 DTEND;VALUE=DATE:20141030 SUMMARY:Reserved - XXXXX XXXX LOCATION: The Boardwalk # 182:___ END:VEVENT PRODID:-//[login to view URL], Inc.//EN BEGIN:VEVENT UID:3d61f25d-cf8d-419e-a1d6-8e7e1d29d8bb DTSTAMP:20180424T184453Z DTSTART;VALUE=DATE:20141227 DTEND;VALUE=DATE:20141230 SUMMARY:Reserved - XXXXX XXXX LOCATION: The Boardwalk # 182:___ END:VEVENT     Second ICS for group   BEGIN:VCALENDAR PRODID;X-RICAL-TZSOURCE=TZINFO:-//XXX Inc//Hosting Calendar 0.8.8//EN CALSCALE:GREGORIAN VERSION:2.0 BEGIN:VEVENT DTEND;VALUE=DATE:20170501 DTSTART;VALUE=DATE:20170427 UID:1418fb94e984-cb13bc7e801058b11d59bae6f9ae062e@[login to view URL] DESCRIPTION:CHECKIN: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX SUMMARY:XXXXX XXXXX (HM8MCRJX2R) LOCATION: The Boardwalk # 182 END:VEVENT BEGIN:VCALENDAR PRODID;X-RICAL-TZSOURCE=TZINFO:-//XXX Inc//Hosting Calendar 0.8.8//EN CALSCALE:GREGORIAN VERSION:2.0 BEGIN:VEVENT DTEND;VALUE=DATE:20170601 DTSTART;VALUE=DATE:20170527 UID:1418fb94e984-cb13bc7e801058b11d59bae6f9ae062e@[login to view URL] DESCRIPTION:CHECKIN: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX SUMMARY:XXXXX XXXXX (HM8MCRJX2R) LOCATION: The Boardwalk # 182 END:VEVENT BEGIN:VCALENDAR PRODID;X-RICAL-TZSOURCE=TZINFO:-//XXX Inc//Hosting Calendar 0.8.8//EN CALSCALE:GREGORIAN VERSION:2.0 BEGIN:VEVENT DTEND;VALUE=DATE:20170411 DTSTART;VALUE=DATE:20170420 UID:1418fb94e984-cb13bc7e801058b11d59bae6f9ae062e@[login to view URL] DESCRIPTION:CHECKIN: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX SUMMARY:XXXXX XXXXX (HM8MCRJX2R) LOCATION: The Boardwalk # 182 END:VEVENT I will also need to display multiple formatted ICS links in into one combined availability calendar and output a new combined ICS calendar link. Grouping one ""Calendar week "" Grouping two ""Calendar week "" Grouping three ""Calendar week ""