Ruby/Rails - How to convert seconds to time?

The simplest one-liner simply ignores the date:

Time.at(82800).utc.strftime("%I:%M%p")

#-> "11:00PM"

Not sure if this is better than

(Time.local(1,1,1) + 82800).strftime("%I:%M%p")


def hour_minutes(seconds)
  Time.at(seconds).utc.strftime("%I:%M%p")
end


irb(main):022:0> [0, 1800, 3600, 82800, 84600].each { |s| puts "#{s} -> #{hour_minutes(s)}"}
0 -> 12:00AM
1800 -> 12:30AM
3600 -> 01:00AM
82800 -> 11:00PM
84600 -> 11:30PM

Stephan