Date Time field machine name/view mode for theming using paragraphs
The best way to Debug this is to enable twig debug
open up or create sites/default/services.yml

change 

 http.response.debug_cacheability_headers: true
 twig.config: 
   auto_reload: true
   cache: true
   debug: true


once done run drush cr or clear your cache 

then go to the page with the paragraphs on them and inspect the element in chrome 
you will see ... 
some thing like 

&lt;!-- FILE NAME SUGGESTIONS:
  * field--paragraph--field-range--event.html.twig
  * field--paragraph--field-range.html.twig
  * field--paragraph--event.html.twig
  * field--field-range.html.twig
  * field--daterange.html.twig
  x field.html.twig
  --&gt;


then theme the new field templates to your liking