Hello Roland
Wow, that’s a tough one. This site’s code does not point to any CMS, including WordPress. As such, I am unable to determine if this is our plugin (at this time we only work on WordPress powered sites). It does look like a lot of customization compared to our normal layouts. You can take a preview at some of our different layouts at http://wpshindig.com/events and toggle the View As near the top right area on the calendar.
We’re limited in helping with styling customizations, per our Scope of Support / Terms. However, if you have decent developer skills, you can achieve a lot of customizations by following along with our Themer’s Guide.
Is there anything else I can do to help you?
Thanks
Courtney 🙂