z timezone formatting option does not transform date

[SirSerje]

Describe the bug
When I want to use z as format value, it returns z without transformation

dayjs.extend(utc)
dayjs.extend(timezone)
// ...
export const formatDateTime = (
    datetime: string,
    timezoneStr: string,
    formatStr: string
  ): string => {
    const date = dayjs(datetime).tz(timezoneStr);
    return ${date.format(formatStr)} ${date.format('z')};
  };

test case:

beforeAll(() => {
  dayjs.extend(utc)
  dayjs.extend(timezone)
})
it('formats with the correct timezone abbreviation', () => {
    const datetime = '2024-11-18T12:00:00Z';
    const timezoneStr = 'Europe/London';
    const formatStr = 'YYYY-MM-DD HH:mm:ss';
    const formattedDate = formatDateTime(datetime, timezoneStr, formatStr);
    expect(formattedDate).toBe('2024-11-18 12:00:00 GMT'); // assuming GMT for the timezone
});

I've been looking into sources: https://github.com/iamkun/dayjs/blob/dev/src/index.js#L333 but unfortunaltelly lowercase z is not included

Expected behavior
z will be transformed correctly according to https://day.js.org/docs/en/plugin/advanced-format

Information

• Day.js Version 1.11.13
• OS: 14.6.1 (23G93)
• Browser Version 130.0.6723.117 (Official Build) (arm64)
• Time zone: Eastern Standard Time > Time zone in Ottawa, ON (GMT-5)

[ChaiyoKung]

Try to use advancedFormat plugin

import advancedFormat from "dayjs/plugin/advancedFormat";

dayjs.extend(advancedFormat);

Normal format function not support z, but you can use advancedFormat plugin to make it support z.