A comma-separated list of days of the week. The day-of-week units corresponds to the integers 1 through 7 (where 1 is Sunday, 2 is Monday, 7 is Saturday) for weekly repeating reminders, but must be modified to the integers 8 through 42 to indicate the nth occurrence of the specific day-of-week within a monthly repeating reminder. The values 1 through 7 indicate all days of this type within the recurunit, and is only valid for use with weekly reminders. Monthly recurunit reminders require you to specify the nth occurrence of the day-of-week within the month. To indicate the nth occurrence, you need to add n*7 to the day-of-week unit (where n=1 through 4 indicates 1st through 4th occurences, and n=5 indicates the last occurrence within the month).