I set up a Github repository for branchhours, a short Ruby script I wrote to help show library branch opening hours on the home page. I set up a bunch of Google calendars, one for each branch, and use them to hold the hours the branch is open or an indicator it's closed. It's not in production yet, but it seems to work OK as it is, so I thought I'd mention it. I'll post more about it when it goes into use.
If the idea of using Google Calendar to show library branch opening hours on a home page seems familiar, perhaps that's because you read Using Google Calendar to Manage Library Website Hours by Andrew Darby (Code4Lib Journal #2). It's a simpler variation on what he did, in Ruby instead of PHP and without using a database or showing reference librarian information.