What day is Nintendo's eShop updated on?

I've been looking around and can't seem to find any solid confirmation on what day new titles are added to the eShop. I know within the next 7 days or so I'll find out, but I thought this might also make a good reference question for others.

So, to slightly rephrase; around the world, what day are new titles added to Nintendo's eShop for the 3DS and Wii U?

Looks like the eShop will update on Thursdays, starting on June 16: Nintendo moves US eShop updates to Thursdays.

This article from Nintendo life states that the eShop, as well as all other Nintendo online stores will update on thursdays:

Now the 3DS eShop is available, all Nintendo's downloadable store fronts will be updated on Thursdays. That means WiiWare, DSiWare and 3DS software will all go live on Thursday, with press releases on the same day.