The Doomsday Clock is a symbol which represents the likelihood of a anthropogenic global catastrophe. The clock represents catastrophe as "midnight" and the Bulletin's opinion on how close the world is to such as a number of "minutes" (and recently "seconds") to midnight.
Its original setting in 1947 was seven minutes to midnight. It has since been updated up and down according to the world events of the time. In recent years, the increments have been shrinking as the clock gets closer to midnight. The last update as of writing (in January 2020) shaved only 20 seconds from the countdown, setting the clock at 100 seconds to midnight.
This question asks: When will the Doomsday Clock reach midnight?
This resolves to the first time at which the Bulletin of the Atomic Scientists announces that the Doomsday Clock has reached midnight. The question should retroactively close one day before the relevant announcement.
If resolution has not occurred on 2100-01-01, this resolves to > 2100-01-01.
If either the Bulletin of the Atomic Scientists or the Doomsday Clock cease to exist or are otherwise defunct before resolution, this resolves ambiguous.