CP search for entries by postDate? Does the control panel search support postDate, expiryDate, dateCreated, dateUpdated?

For a custom date field, the below will return all dates in October 2017:
customDate:2017-10

But for entry attributes like postDate it returns nothing:
postDate:2017-09

Sure would be good to be able to search by these date values.
Currently, the postDate of an entry is not indexed for search.

Kind of hacky, but you could make a custom DateTime field with duplicate information (i.e. myPostDate) and do a search based on that.