.calendar() does not respect timezone information

[timrwood]

Copied from moment/moment-timezone#17

If you look here

moment/moment.js

Line 1266 in ae34b81

var diff = this.diff(moment().startOf('day'), 'days', true),

We are creating a fresh moment with the no timezone information so the calendar() method doesn't calculate the day diff correctly.

I've manually fixed this by inlining the body of the method into my code.