Write. Post the places to go for the awesome Pastry deals in local areas! Blog posts with listicles are a hit, almost always. Remember to use a video to promote the blog.
Promote. Talk about the deals you have at your pastry shop or the treats you sell and make online with a promotional video showcasing your goodies.
Celebrate! Or post a good ol' fashioned video saying Happy Pastry Day! Ask your audience what their favorite pastry dishes are. Use that to your advantage, collect the info, and keep it in mind for the next holiday.
Hashtags to use today: #NationalPastryDay, #PastryDay, #Desserts, #Yummy, #Foodie, #Sweet, #Pastry.