Faker.NaiveDateTime Faker.NaiveDateTime.forward(4) #=> ~N[2016-12-25 06:02:17.922180] Faker.NaiveDateTime.backward(4) #=> ~N[2016-12-20 06:02:17.922180] Faker.NaiveDateTime.between(~N[2016-12-20 00:00:00], ~N[2016-12-25 00:00:00]) #=> ~N[2016-12-23 06:02:17.922180]