National Sisters' Day is observed in the United Sates on the first Sunday in August every year. It falls on August 2 this year. As we celebrate the day, we bring to you beautiful quotes to send your sisters. On National Sisters' Day 2020, share these thoughtful quotes with your sisters and let her know how much you mean to them. Sisters share a beautiful bond and not everyone is blessed with it. So celebrate your sisters and spent the day with them. Happy National Sisters' Day!