Update README timezone FAQ for Rails gh-230 gh-233

CREDITS.txt

@@ -53,6 +53,7 @@
 
 == Feedback
 
+- Alexander Deeb - https://github.com/adeeb1 - gh-230
 - Sofia Bravo - http://stackoverflow.com/users/1123850/sofia-bravo - gh-231
 - zzjin - https://githu.com/zzjin - 3.3.x vs CST abbreviated timezone - gh-228
 - lovingyu - https://github.com/lovingyu - fallback to ENV['TZ'] - gh-222

README.md

@@ -1458,6 +1458,20 @@ scheduler.every '2s' do
 end
 ```
 
+On Rails you might want to try with:
+```ruby
+ENV['TZ'] = Time.zone.name # Rails only
+scheduler = Rufus::Scheduler.new
+scheduler.every '2s' do
+  puts "#{Time.now} Hello #{ENV['TZ']}!"
+end
+```
+(Hat tip to Alexander in [gh-230](https://github.com/jmettraux/rufus-scheduler/issues/230))
+
+Rails set its timezone under `config/application.rb`.
+
+Rufus-Scheduler 3.3.3 detects the presence of Rails and uses its timezone setting (tested with Rails 4), so setting `ENV['TZ']` should not be necessary.
+
 The value can be determined thanks to [https://en.wikipedia.org/wiki/List_of_tz_database_time_zones](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).
 
 Use a "continent/city" identifier (for example "Asia/Shanghai"). Do not use an abbreviation (not "CST") and do not use a local time zone name (not "中国标准时间").