DateTime format issue in Phoenix. Change Time Zone

I am dealing with DateTime in Elixir. I want to change my Time Zone and date format. 2019/02/06 23:10 is my required format here. But when I use <%= "#{NaiveDateTime.utc_now}" %> This 2019-03-01 06:23:20.443620 shown.

I also want to change my timezone. Toronto, ON, Canada (GMT-5)