Unit of DateTime sensors not passed along correctly.

[cstierle]

When I add DateTime parameters like ID_Einst_SuHkrW0_zeit_0_0 to my Home Assistant instance, no unit_of_measurement and device_class attributes are passed along. Instead, a raw value in seconds is passed as state, which is hard to handle.
I've been trying to read it as a UNIX timestamp but doing so interprets it as a UTC time ignoring the time zone I am in.
How can I get a useful entity?