DayJS Timezone Does Not Accept UTC (Zulu) Timestamp as Argument

[ChildishDanbino]

Describe the bug
Hey! Just first things first I want to say thanks for the library. Our team is in the process of getting rid of momentJS across the whole app and we are attempting to convert fully over to dayJS but ran into this issue today.

In Moment-Timezone you can pass a timestamp as follows using the Zulu format and an olson timezone to convert a date.

moment.tz("2020-12-14 19:58:00.000Z", 'America/New_York').format()
// returns 2020-12-14T14:58:00-05:00

DayJS appears to be ignoring the "Z" formatting:

 dayjs.tz('2020-12-14 19:58:00.000Z', 'America/New_York').format()
// returns 2020-12-14T19:58:00-05:00

Expected behavior
I would expect the output of dayJS and MomentJS this to be the same given the same input. There might be a DayJS Method we could use to get the same result but I am currently unaware of it.

Information

• Day.js Version: 1.9.7
• OS: Mac OS Mojave 10.14.6
• Browser [e.g. chrome 62]
• Time zone: US Eastern Standard Time (EST -5:00)

[chengB12]

Probably same as #1265

[ghiscoding]

or this other issue #1358 that got fixed but is not working in strict mode