Start View
Open the picker on the year list, which suits a birthday field. This page documents @pglejzer/datepicker-ui, the companion of timepicker-ui.
Docked popover
#ui.startView is the first panel shown when the picker opens: "day", "month" or "year". Here the docked popover opens on the year list, and maxDate stops the list at the current year.
Modal dialog
#The modal shows the year grid instead of the list.
Note
startView is ignored in range mode, when calendar.precision is not "day", and when ui.initialView is "input".