One of the workable solutions for calendars that hasn’t really been adopted in North America is the use of the week number. Some digital calendars and paper calendars have it, but it is usually rare. Instead of saying “we can meet the Tuesday of the week of Aug. 18” you can say “week 34”. The catch - All weeks are starting on Monday and ending on Sunday. There are multiple systems for week numbering, this is the ISO week date standard (ISO-8601), other systems use weeks starting on Sunday (US) or Saturday (Islamic).