AWSDate

An extended ISO 8601 date string ( https://en.wikipedia.org/wiki/ISO_8601#Calendar_dates ) in the format YYYY-MM-DD Can optionally include a time zone offset ( https://en.wikipedia.org/wiki/ISO_8601#Time_zone_designators ). For example, the values 1970-01-01Z, 1970-01-01-07:00, and 1970-01-01+05:30 are all valid for AWSDate. The time zone offset must be either Z (UTC) or an offset in hours and minutes (and, optionally, seconds). For example, ±hh:mm:ss. The seconds field in the time zone offset is considered valid even though it's not part of the ISO 8601 standard.