Search: how to sort by date only (NOT category AND date)

Hi Tom,

search results are shown by 1. category and 2. date: http://www.fudiggl.de/?s=Oberhausen

I use The-Events-Calendar (Modern Tribe) to manage our dates and gigs ("events"). And then there are some posts with different categories ==> how can I sort the results, so events and posts are mixed up and ordered by date only?

Any (fast) idea? Or better to ask the MT-guys?

Thank you in advance, Sven