Do you have a fine sister, too?

Ok, I admit my sister is a little bit finer than yours.  But still, let's combine energies and declare a likely coming day "National Sisters Day".  Yes, I am proposing a little conspiracy.  Here is a handy tool that will help us make National Sisters Day rival today (Oatmeal Day).  The tool is NationalDayCalendar.com and it lists days of the year that are already devoted to something, frequently to multiple glories.  For instance, not only is today reported to be Oatmeal Day but also National Cat Day and National Hermit Day.