The government shutdown is an increasingly sharp tool in the US president's toolbox since President Ford wielded it first in 1976.
On the back of a reinterpretation of the 1884 Antideficiency Act President Carter was first to furlough government workers for the duration of a shutdown in 1980, giving the shutdown publicly visible teeth.
The current shutdown by President Trump is his third this term, and the longest by a good stretch (currently 9 days, compared to his previous three days and a couple hours respectively). The cost for such a shutdown can be enormous, which should be an incentive to not unnecessarily protract it.
Thus we ask:
When will the shutdown end?
It began on 22 Dec 2018, 9 days as of this writing. The record holder is President Clinton with 21 days. Resolves when credible media account indicates so, and if necessary closes retroactively 24 hours before the last step (e.g. Trump's signing something or a vote taken in a house of congress) that leads to the re-opening.