#twelvemonth__yr  a period of time containing 365 (or 366) days; "she is 4 years old"
  supertype:  time_period__period__period_of_time  an amount of time; "a time period of 30 years"; "hastened the period of his recovery"
  subtype:  church_year  Holy_Year  New_Year  common_year  leap_year  off_year  off_year.twelvemonth  calendar_year  fiscal_year  year_of_grace  Y2K
  part of:  decade__decennary__decennium  a period of 10 years
     part of:  century  100 years
        part of:  millennium  a span of 1000 years

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