These are half days during the week, during which you have protected time off. They have, after careful consideration, been built into your rotations already. You should have be notified individually regarding your scheduled days. You may schedule doctors’ appointments and other such events that need to be taken care of during business hours during these times.
If you need to make appointments outside of these times, please contact the chiefs at firstname.lastname@example.org. Thank you, and be well!