Loved it from the start, last November; all well until 28 February date-change.
The winding knob does three things: push in to illuminate; pull part-way out to set date; pull fully out to set time.
It's fiddly and frustrating and, this time, the knob pulled right out! It went back in, and still seemed to work, but I imagine the water resistance was compromised.
Returned to Amazon as faulty. Very happy with returns process.
Dilemma: get a replacement and tiptoe round it, or walk away sadder and wiser?