On this page
No Headings
Preferred delivery date and time
objecttyperequiredstring"DELIVERY_DATE_PREFERENCE"This should match the CheckField type.
preferred_datestringdatePreferred delivery date
time_windowstring"morning", "afternoon", "evening", "anytime"Preferred time window
specific_timestring^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$Specific preferred time (HH:MM format)