I could not have received a more perfect stamp for today. This one is from a Finnish set of 6 (A to F) called Moomin ABC issued in 2022, and promotes writing and reading. Here's a link to more about the stamps. It's a bit hard to find out if this is the first of series, however I think more will be issued in future.
I also thought about España/Espanya for today. I'm always curious how language develops, and I find it interesting that in many languages the E is dropped when referring to the country e.g. Spain (English), Spanje (Dutch) etc.
E is also for EUROPA, an annual common theme for stamps issued by many European countries. Eva sent me this stamp, which is Spain's entry for 2010: Children's Books, that shows a child enjoying reading.
For more philatelic connections to the letter E, head over to See it on a Postcard.