Option to display time zone in .format() not working

[JorgeSivil]

Describe the bug

import dayjs from 'dayjs';
import dayjsUtc from 'dayjs/plugin/utc';
import dayjsTimezone from 'dayjs/plugin/timezone';
import dayjsAdvancedFormat from 'dayjs/plugin/advancedFormat';
dayjs.extend(dayjsUtc);
dayjs.extend(dayjsTimezone);
dayjs.extend(dayjsAdvancedFormat);

dayjs(unixTimestamp).tz('America/Los_Angeles').format(`z`) // results in z being outputted instead of the short timezone name.

The other advanced format options do work (at least the ones not requiring a plugin)

Expected behavior
Should be able to display timezone short name / long name

Information

• Day.js Version "dayjs": "^1.9.3", plugin-utc": "^0.1.2",
• OS: Linux
• Browser Firefox 82
• Time zone: [e.g. GMT-07:00 PDT (Pacific Daylight Time)]

[JorgeSivil]

Fuck I'm so tired of being wrong

[mrkrlli]

Newest version of dayjs will have the z formatting option (added in 1.9.0): #1069