Moment.js formatting incorrect

I'm using moment.js for my react-native project datetime formater. I want to remove the timezone from utc date. For my timezone is GMT+8000, so for utc offset is correct, when when I add format('YYYY/MM/DD 00:00'), result subtract one day.

console.log(moment.utc());
-> Moment {_isAMomentObject: true, _isUTC: true, _pf: {…}, _locale: Locale, _d: Wed Jul 11 2018 11:08:57 GMT+0800 (Malaysia Time), …}

console.log(moment.utc().utcOffset(new Date().getTimezoneOffset()));
->Moment {_isAMomentObject: true, _isUTC: true, _pf: {…}, _locale: Locale, _d: Wed Jul 11 2018 03:08:57 GMT+0800 (Malaysia Time), …}

console.log(moment.utc().utcOffset(new Date().getTimezoneOffset()).format('YYYY/MM/DD 00:00'));
->"2018/07/10 00:00"

Any idea how ? Or maybe I doing it wrong ?