Hello,

Unfortunately, by default there are no any other calendars or Hijri Calendar time format. If you need to set up the new calendar, for example for case resolution time calculation, feel free to refer to the following article and create your custom calendar (calendar setup paragraph) https://academy.bpmonline.com/documents/service-enterprise/7-15/how-setup-response-and-resolution-time-calculation

Other than that, unfortunately, it is not possible to set up the time and date format according to Hijri calendar. We will register the idea of adding more calendars in our R&D team backlog for implementation in the future application releases. 

Best regards,

Dean