Penny's By Plaza Flowers Sisters are some of the best people in the world, and it is no surprise that National Sisters Day was created to celebrate their special bond. This year, you can celebrate your sister by sending caring National Sisters Day Flowers. This gift will make her happy and show how much you love her! National Sisters Day is a holiday that is celebrated on August 6th this year. It was created by Hallmark in 2000 and is meant to honor the special bond between sisters and celebrate their unique friendship.   SPECIAL DISCOUNT OFFERS - USE ON MAIN WEBSITE     To celebrate National Sisters Day, you could: Give your sister a call or text her to say, "Happy National Sisters Day!" Take her out for lunch or dinner at her favorite restaurant (or make her favorite meal). Send her flowers or another thoughtful gift with a note reminding her how much she means to you! If you do not have a sister, consider celebrating National Sisters Day by calling or texting one of your close friends. You can also send them flowers or another thoughtful gift with a note reminding them how much they mean to you! The [...]