ExposedDatetime

[Thingus]

Is your feature request related to a problem? Please describe.
Datetime is useful for building internal query ranges, but query objects pass datetime around as strings.
Converting between string and datetime internally gets in the way of clean code and can introduce bugs due to malformed date formatting strings

Describe the solution you'd like
Getter and setter mixin for start_date and end_date (for now) that exposes them as datetime objects.

Describe alternatives you've considered
standardise_date can go from most sensible formats to a string, but not to a datetime.