I don't, for that I usually rely on search engine or autocorrect. I hate the fact that it is not pronounced as it is written. Because I always go with "Wenesday" on my own.

Ah, yet it's easy!

The day of Wednes. Wednes, old spelling of wedness, the state of being wed.

(So my comment is not totally useless, I'll link to the actual etymology for the ones who are now curious - my sibling comment already alluded to it)

https://en.wiktionary.org/wiki/Wednesday#Etymology

I'm generally for spelling reform, but I like Wednesday's reference to Odin/Woden. Maybe respell it Wedensday and pronounce it like that too.

I'd go all iso format when it comes to that. do you mean "Wed SEP 3"?