Abbreviated Timezone for IST/GMT+5:30

When using the required plugins, the abbreviated timezone is not working for IST. With z, it shows GMT+5:30, but with zzz, it correctly shows Indian Standard Time.

import { Pipe, PipeTransform } from '@angular/core';
import * as dayjs from 'dayjs';
import * as advancedFormat from 'dayjs/plugin/advancedFormat';
import * as utc from 'dayjs/plugin/utc';
import * as timezone from 'dayjs/plugin/timezone';

@Pipe({
  name: 'dayjsTz'
})
export class DayJsDateTimePipe implements PipeTransform {
  public transform(value: Date, timeZone?: string, formatting = 'MMM Do YYYY, h:mm a z') {
    if (value) {
      dayjs.extend(advancedFormat);
      dayjs.extend(utc);
      dayjs.extend(timezone);
      if (timeZone) {
        return dayjs.tz(value, timeZone).format(formatting);
      }
      const userTimeZone = dayjs.tz.guess(); // here it guessed my timezone, Asia/Calcutta. I also tried hardcoding Asia/Kolkata, same result
      return dayjs.tz(value, userTimeZone).format(formatting);
    }
    return value;
  }
}

Current Output — Oct 20th 2020, 2:17 pm GMT+5:30 Expected Output — Oct 20th 2020, 2:17 pm IST

• Day.js Version 1.9.3
• OS: macOS Catalina 10.15.7
• Browser Chrome 86 and Safari 14

[iamkun]

Seems a good choice. I’ll dig it more if I got some time.

[tanyaburlakova]

hello @iamkun

could you please let me know if this issue/feature is done or maybe in progress? In the doc I see it says we can use z for timezone abr https://day.js.org/docs/ru/plugin/advanced-format but it doesnt work.

Thank you!