Ken
We use calcium calendar from black bear software. 

It's not free - but we have been using it for some time now. 

It has the ability to display RSS feeds so we use that for "today's hours" on our home page. We have 12 libraries - no two have the same hours . So, each library has its own calendar.  You can use Css to change the display, set permissions on calendars , etc

Sent from my iPhone

> On Jul 1, 2015, at 9:02 AM, Ken Irwin <[log in to unmask]> wrote:
> 
> Hi folks,
> 
> I'm hoping to find some sort of web-based app that can manage the library's hours of operations, including:
> 
> *         Displaying today's hours
> 
> *         Displaying an upcoming schedule of hours
> 
> *         Updatable though a GUI interface by non-techy library staff
> 
> *         Able to update our Google Places account hours (which, I note, currently lists our school-year hours as our open hours today), perhaps on a daily basis
> 
> *         Preferably a stand-alone thing that can provide data on an ad hoc basis (as opposed to a CMS-specific thing like a WP plugin or a Drupal module)
> 
> *         PHP preferred but not necessary
> 
> *         OSS / free preferred but not necessary
> 
> I feel certain that someone else has already wanted this enough to create it. Anyone have a solution they're happy with?
> 
> Thanks
> Ken