Datetime element is designed to have sane defaults so any or all can be omitted. Both the date and time components are configurable so they can be output as HTML5 datetime elements or not, as desired.
The placeholder will be shown in the element until the user starts entering a value.
Date placeholder
A description of the range of years to allow, like '1900:2050', '-3:+3' or '2000:+3', where the first value describes the earliest year and the second the latest year in the range. A year in either position means that specific year. A +/- value describes a dynamic value that is that many years earlier or later than the current year at the time the webform is displayed. Use min/max validation to define a more specific date range.
Date year range
