Education History: Letter of Completion Date or Diploma Award Date?

[River1]

Hi there - I am a bit stuck in the education section of the Express entry profile. Do i enter the date i received my letter of completion (August 2021) or the date i was awarded my diploma (November 2021) in the education history section PR Express entry profile?

 

[cz999]

I put letter of completion (Aug 2021) there. Since Ircc is happy to issue pgwp after that date, I think they consider the letter of completion to signify the conclusion of the program. Got my PR without issue.