click on a folder → View tab

  -> Select "Show as Conversations" 
  -> In "Conversation Settings" -> select "Use Classic Indented View"
  -> In "Message Preview" -> select Off

The following should be checked when you right click on the message index pane

  Date (Conversations)
  Show as Conversations
  Show in Groups

Select sorting so as to display new items at the bottom.

File -> Options -> Calendar
-> Work time -> Work Hours
-> set 'Start time:' to 12:00 AM
-> Set 'End time:' to 11:30 PM
-> Select all days in 'Work Week:'
-> OK

Found the answer in | https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_other-mso_2016/outlook-calendar-view-how-limit-hours-shown/7c0524d8-3b03-4bc4-ac23-e21c872d9bbc