gistfile1.txt

irb(main):006:0> puts ({created_at: Time.now}).to_json
{"created_at":"2014-07-09T06:20:34.167-07:00"}

irb(main):007:0> puts JSON.pretty_generate({created_at: Time.now})
{
  "created_at": "2015-04-16 20:36:24 -0700"
}

did you find out what was causing this? I got here from http://stackoverflow.com/questions/86653/how-can-i-pretty-format-my-json-output-in-ruby-on-rails#comment47516432_23018176

>> puts ({created_at: Time.now}).to_json
{"created_at":"2016-02-25T14:25:41+00:00"}

>> puts JSON.pretty_generate({created_at: Time.now})
{
  "created_at" : "2016-02-25T14:25:42+00:00"
}

@johnrees it's ActiveSupport's redefinition of to_json.