Adapt a Drupal 7 module (programming) -- 2

We have currently a project, where users can search ads and filter results using a dedicated block (Filter by date >> start date), see there: [login to view URL] Unfortunately the dates are not formatted very well: 08:00 07/16/2015 (1) 08:15 07/18/2015 (1) 08:30 07/17/2015 (1) We want to change this format to something like that: Thursday 16 july -08:00 -08:45 Thursday 17 july -08:30 Thursday 18 july -08:15 Please see this post: [login to view URL] This page is a custom page defined in custom module booked4me_search. The search is using Search API ([login to view URL]) and Facet API ([login to view URL]) I tried so solve the issue by creating a custom filter with Facet API Bonus ([login to view URL]), but I am stocked. Please check the file: booked4me/sites/all/modules/krown/booked4me_facets_custom/facetapi/[login to view URL] Normally, there you can format the facets, but I don't see how to group them by day. Need some assistance there. You can download the whole project there: [login to view URL] In your proposal, please indicate how are you going to achieve the project: Are you going to use the code already done or create a custom module from scratch? My opinion is that you should use the the existent code into : booked4me/sites/all/modules/krown/booked4me_facets_custom/facetapi/[login to view URL] Did you check this class? I am sure it's almost done, because there is already a #item-parents & #item_children into the $build array (Please check the attached files)