How to display/hide a field only if has a certain value?
Hope youre feeling better! You should be able to achieve this by: 


exclude the Date field from view. 
in the Later Date field, under "rewrite results" check "Rewrite the output of this field. at the bottom of that fieldset expand Replacement patterns to see all the tokens available.  You should see somethine like [Date] to indicate the content from the Date field. Enter that into your text. 
In the "no results behavior" section, enter "Date to Be Determined" in the "No results text" box. check Count the number 0 as empty (so when the box isn't checked it will show your "Later" message) and check "Hide rewriting if empty"
Save view and refresh caches