The following pair was submitted by Chipper 42; today happens to be “Hug a Sheep Day” (make of that what you will: both of these comics were originally published on April 5th).
P.S. While I understand the editorial position that CIDU should not actively solicit “Synchronicity” comics (primarily because the result tends to be far too many mild, random coincidences), I’m not about to ignore a superb example when I see one, especially when there is an ideal date on which to present it.
Comics I Don't Understand 
I think I’ll celebrate by having my wife put on a wool sweater.
Of course if you included the “Dark Side of the Horse” in this theme, you’d have about a cartoon a week. Not to mention elevator buttons, apples falling from trees, idea light bulbs…
I once tried counting cartoons that used the trope of counting sheep, but I kept dozing off.
👏 👏 for Grawlix.
👏 👏 for Grawlix.