Ruby/Rails - How to convert seconds to time?

Question

I need to perform the following conversion:

0     -> 12.00AM
1800  -> 12.30AM
3600  -> 01.00AM
...
82800 -> 11.00PM
84600 -> 11.30PM

Answer 1

The simplest one-liner simply ignores the date:

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

#-> "11:00PM"