In every other language I've used, a time value of 0 is used when a datetime only contains a date and doesn't have a specific time. The existing behavior would

In every other language I've used, a time value of 0 is used when a datetime only contains a date and doesn't have a specific time. The existing behavior would make sense in that context. I know Python also has a separate date object, are the two interchangeable enough that you could mix and match without problems?