1, 2, 3, 4 Monsters Walking 'Cross the Floor
In writing this sentence, I've already celebrated Put Something in Sequence Day.
This is a very easy day to celebrate. As I've already shown, you can write (type) things in sequence. You can put physical objects in sequence - perhaps in Roy G. Biv order. (Or is it Roy G. Bv now?)
You could even put ideas in sequence in your head and no one would be the wiser.
Sticks, eggs, quails, umbrellas, elevators, nuts, cars, emus...you can put just about anything in a sequence.
Sometimes the reason that you put things into a sequence is only obvious to you. And that's okay. It makes people wonder what you're up to.
The only danger in celebrating this day is that you forget to do it.
If you forget to do it, then "Sequence Rules" apply.
And don't forget, everything is just like Sequence.