Date-based filtering for inbound file adapters

I was asked about using date-based criteria in the file spec for an inbound file adapter.

It looks like the file spec field only accepts simple wildcards (*, ?), so I'm wondering if someone knows of a clever way of doing this preferably without creating a custom adapter/service class.

An example of the use case:
An upstream system continually writes records to a file named with the current day's date. At midnight it opens a new file with the new day's date:

2016-07-14.dat
2016-07-15.dat

Shortly after midnight on July 15 we want Ensemble to pick up 2016-07-14.dat for processing, but ignore 2016-07-15.dat.