Free type Office hours

At the moment, Intercom Office Hours page only supports 15 minutes increments. It's not currently possible to set a custom start/end time. It would be good to be able to free type office hours. Example of when it is crucial to have this possibility: For one of our teams we have office hours until 10 pm CET, then all conversations are routed to other inbox. However, we found a gap of 1 min where we no longer have available agents covering inbox (chats appearing until 10:01 pm CET), so I would like office hours to end at 21:59.