Let say I have some date in a variable called dateObject (1 July 2019 05:00:00 UTC), then doing: formatToTimeZone(dateObject, 'DDHHmm[Z] MMM YYYY', { timeZone: 'UTC' }) should give: 010500Z Jul 2019 but instead gives: 010500+00:00 Jul 2019 I thought doing [Z] escapes the Z like the M in [GMT]????