This is a rather specific food day. Rather than being a general popsicle day - popsicles are also known as ice pops and ice lollies amongst others, as Popsicle® is actually a registered trademark of Unilver, Inc. - this is a very specific one.
All true ice pops or lollies are made from frozen liquid (usually, but not always, frozen onto a stick) which has been flavoured and coloured. These particular ones have been flavoured and coloured in a very specific manner - with cherries and coloured red. A cherry popsicle that was another colour just wouldn't seem right.
Cherries themselves are a type of fleshy drupe, or stone fruit, that come from many trees, but only a few varieties are actually eaten. Cherry popsicles are flavoured with these although, in most cases, it's unlikely that there will be much more than cherry flavouring in the lolly.
