The unofficial holiday honors the strong bond that people share with their sister(s). Sometimes called National Sisters' Day in the United States, the holiday encourages people to celebrate the special relationship between them and their sister(s).
How to Celebrate?
If you live far from your sister, call them or send them a card telling them how much you love them and appreciate them.
If you live close to them, visit them or take them out for a nice meal and treat them to their favorite dessert.
Don't have a sister who you share genes with? What about celebrating your female friends who have provided you the love and support that only a sister can?