Always 15th Dec is considered National Lemon Cupcake Day. Not everyone enjoys the taste or flavour of lemon. But those who enjoy the tart, will agree that the lemon cupcake fully deserves it's day for recognition. Buy or make lemon cup cakes today. share with your friends and loved ones. Tell people to taste Lemon cup cakes today. Induce them to try one of yours. Try these things, you will certainly enjoy National Lemon cupcake day. Wearing a silicone wristband with a message " National Lemon Cupcake Day" will help you remember this day.