Sets or gets the earliest date that a site visitor can select.
Setting the minDate property prevents site visitors from selecting
dates before the minimum date.
Set minDate to undefined to remove the current minimum date limitation.
Getting the minDate property returns the current minimum
date that a site visitor can select.
If a date is before the minimum date but is also set as an enabled date
with the enabledDateRanges property, the date is
disabled and the site visitor can't select the date in the date picker.