The simplest way to do this is to use Rails' #l helper method like so:
l @project.end_date
You can also use a format you defined in locales .yml file:
l @project.end_date, format: :short
# config/locales/pirate.yml
pirate:
time:
formats:
short: "arrrround %H'ish"
The Rails guide covers this. Hope that helps!