Hours of Operation

I actually had to be part of a situation like this.

The venue had failed to think through the full ramifications of opening times and staff hours, but it was eventually worked out, although had an understandable knock on effect on new staff who had been planning their travel arrangements around the orignally advertised job times. It's a bit rubbish too, having to tell someone who has just finished their visit that they can't buy anything, because you have already closed the till up.