[ksa]

Мне необходимо распарсить: arr.time

Должно быть 2018-06-25T07:00:00

var str='20180625T070000';
alert(str.replace(/(\d{4})(\d\d)(\d\d\S\d\d)(\d\d)(\d\d)/,'$1-$2-$3:$4:$5'));