The API only accepts dates formatted in the ISO-8601 standard. These dates should be sent with no timezone qualifier. The correct timezone will be implied by the context of the call.
Example:
For dates with a time component
YYYY-MM-DDThh:mm:ss.s eg. 2017-06-29T18:20:00.00
For dates with no time component
YYYY-MM-DD eg. 2017-06-29
where
YYYY = four-digit year
MM = two-digit month (01=January, etc.)
DD = two-digit day of month (01 through 31)
hh = two digits of hour (00 through 23) (am/pm NOT allowed)
mm = two digits of minute (00 through 59)
ss = two digits of second (00 through 59)
s = one or more digits representing a decimal fraction of a second