[christopoulos]

Yes, I agree, and everyone (devs) should think about who they’re really trying to make things easy for.

If you simply say follow the ISO standard you’re essentially making it easy for yourself and hard for the users. Sprinkle that with a drop down day picker as in the example, and you’re really in control of what the input will be. Not much chance of faulty input, right?

However, the ISO will not be relatable for many people and the drop down is a UI nightmare.

The user will be spending much more time with the form than devs (runtime), so this of thinking should definitely be avoided (during programming time).