If your hours are 4a-3p then those are your hours and you shouldn't be put in the position of having to defend them. Anyone who interacts with you should know t

If your hours are 4a-3p then those are your hours and you shouldn't be put in the position of having to defend them. Anyone who interacts with you should know that, should schedule meetings accordingly, and that's kind of it. If people are expecting you to do things after 3p then you remind them that you work a different schedule. If they still press you then that's on them for being unprofessional and you can escalate up the power chain as you see fit.