class ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Date

def cast_value(value)
  case value
  when "infinity" then ::Float::INFINITY
  when "-infinity" then -::Float::INFINITY
  when / BC$/
    value = value.sub(/^\d+/) { |year| format("%04d", -year.to_i + 1) }
    super(value.delete_suffix!(" BC"))
  else
    super
  end
end