when is NATIONAL SISTER WEEK?

Despite pronouncements on various social networking sites and forums throughout the year, there does not appear to be an official "National Sisters Week." However, there is a Sisters Day, which is celebrated on the first Sunday of August. In 2011, it will land on August 7. It shares the day with Friendship Day, International Forgiveness Day and National Lighthouse Day.
Updated on Thursday, February 02 2012 at 10:34AM EST