Parsing datetime discards 1) The milliseconds 2) Time Zone information. API documentation suggests only UTC is used. Comparison between timestamps referencing different time zones is error prone.

https://developer.ebay.com/Devzone/XML/docs/Reference/eBay/types/simpletypes.html#dateTime

I am proposing we add milliseconds and time zone information to the datetime object. This change will make timezone-naive applications fail with TypeError: can't compare offset-naive and offset-aware datetimes