```ruby
# Read about factories at https://github.com/thoughtbot/factory_girl

FactoryGirl.define do
  factory :project do
    book
    client
    release_date 3.months.since
  end
end
```

Fix project factory to use Date in release_date
user
```ruby
# Read about factories at https://github.com/thoughtbot/factory_girl

FactoryGirl.define do
  factory :project do
    book
    client
    release_date 3.months.since.to_date
  end
end
```
assistant