If you hold a private or commercial licence and wish to fly at night time, then a Night VFR rating is for you. To obtain your NVFR rating, your instrument flying skills must be up to standard, so some simulator time is usually included. You will fly a minimum of 2 hours of circuits at night time so you can get used to flying and landing, before flying at least 2 nav flights. There will be thorough briefing on night navigation procedures before you embark on your navs.
Upon completion of your NVFR rating, you will be endorsed to fly single-engined aircraft at night. To fly multi-engined aircraft at night, you will need to complete the flight test in a multi-engined aircraft.