#zero_hour  the time set for the start of an action or operation
  supertype:  time_of_day__hour  clock time; "the hour is getting late"
     supertype:  clock_time__clocktime__time  the time as given by a clock; "do you know what time it is?"; "the time is 10 o'clock"
        supertype:  meter_reading.datum__meterreading__reading  the data presented to a user by a meter or similar instrument; "he could not believe the meter reading"
           supertype:  datum__data_point  an item of factual information derived from measurement or research
              supertype:  information  knowledge acquired through study or experience or instruction
                 supertype:  thing_that_can_be_seen_as_a_relation  usable as relation type
                    supertype:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                       supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

No statement uses or specializes zero_hour; click here to add one.