Purpose of time format?

[somini]

This not an issue, just a question.

I set the NeoMRU time format:

let g:neomru#time_format = '%Y-%m-%d'

But on the Denite interface I get the same output. From what I could gather in the documentation, this was supposed to show the file modification date in the Denite interface? Is there a special setting for this or am I misunderstanding this feature?