It means “whenever it is 4pm wherever you are”.
As in, i want my alarm to go off at 4pm everyday regardless of whether i am traveling.
Python calls it a “naive” time, it has no timezone or offset. Its just a data structure that says “4pm” rather than “4pm eastern time”
An example ive used is when a user had to specify schedules for a digital menu board system. When the user says breakfast ends at 10am, that means wherever the digital menu board is located, not “10am where i was when i set the schedule”. It also doesn’t mean “end breakfast an hour early/late when daylight savings occurs”
It makes sense in any context where you need to do something at a certain time each day, and you specifically don’t mean “do this thing exactly every 24hrs”