16. Timezone calculations (1)

Calculate the times in the ui document, using XForms bind elements to specify the calculation.

Start with slots for default and user-specified timezone offsets:

1<slot id="r10"
      datetime="2020-07-27T10:00:00-04:00"
      user-datetime="2020-07-27T10:00:00-04:00"
      user-time="" uh24="" uh12="" wrapped=""
5      default="10:00">10:00</slot>