def at(secs)
      utc = Time.at(secs).utc rescue DateTime.civil(1970).since(secs)
      utc.in_time_zone(self)
    end
def at(secs)
      utc = Time.at(secs).utc rescue DateTime.civil(1970).since(secs)
      utc.in_time_zone(self)
    end
Method for creating new ActiveSupport::TimeWithZone instance in time zone of +self+ from number of seconds since the Unix epoch. Example:

   Time.zone = "Hawaii"        # => "Hawaii"
   Time.utc(2000).to_f         # => 946684800.0
   Time.zone.at(946684800.0)   # => Fri, 31 Dec 1999 14:00:00 HST -10:00