Ionic's is probably one of the best date+time combo (other examples are always strong in one and terrible in the other, time being the thing that often gets short shrift)

I also quite like Quasar's date picker https://quasar.dev/vue-components/date

Though do not even look at their time picker... It's a mess, I roll a custom component for time when I need it.

Damn that is good. Even with the swipe gesture on mobile. I think we are webscale now

Interestingly it lets see both the iOS and Material Design versions of the component.

iOS has a strange combination of arrows to handle the month: right to expand the months dialog, down to close it. It took me a while to understand that the down arrow would bring me back to the calendar. Why not right and left? Maybe it is how it works on a Mac too.

MD and anything else I remember has a down arrow to expand and an up arrow to close.

just a bit unfortunate that the material design one still has the iOS "wheel" for picking year and month