Here is a quick, clean and easy way to get use from strftime on your date/time fields. Create a file called date_format.rb in the config/initializers directory and add the following code:
ActiveSupport::CoreExtensions::Time::Conversions::DATE_FORMATS.merge!( :datetime_military => '%Y-%m-%d %H:%M', :datetime => '%Y-%m-%d %I:%M%P', :time => '%I:%M%P', :time_military => '%H:%M%P', :datetime_short => '%m/%d %I:%M' )
Then in your views, you can do the following:
@object.time_field.to_s(:datetime) # Or any other format you created