Unknown Post Date for Jekyll Blog file name

I have articles but I don’t want to specify a date for them since they’re unknown. My posts files are showing unless I add a full date.

It is a requirement with Jekyll.
If it is a post, then the filename has to be of the pattern yyyy-mm-dd-title.output_ext.
If you don’t want to follow the pattern, then it should be a different collection other than posts, say articles. i.e., rename the directory _posts to _articles and update the config file with:

collections:
  articles:
    output: true
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