This is for a custody calendar which shows who has the kids and when. There is a situation revolving around several holidays that happen on x Monday of every year. The custody terms give a parent time on that Monday as well as the Sunday before. For example, MLK day is celebrated on the third Monday of January every year. Since it's possible for January to begin on a Monday, I can not begin the calendar event on the third Sunday as it will displace the event by a week.
Is there a way to trigger the event on the third Monday but include the Sunday before within the ICS file?
I'm not sure where to begin here. I have not been able to find anything relevant while searching for a solution.