dayjs("2013-11-18T11:55:20").tz("America/Toronto") does not work

[tukusejssirs]

Describe the bug
dayjs("2013-11-18T11:55:20").tz("America/Toronto") (as suggested in the docs) outputs the following:

const dayjs = require('dayjs')
const utc = require('dayjs/plugin/utc')
const timezone = require('dayjs/plugin/timezone')
dayjs.extend(utc)
dayjs.extend(timezone)

console.log(dayjs('2013-11-18T11:55:20').tz('America/Toronto'))

// Output
{
  '$L': 'en',
  '$d': Invalid Date,
  '$x': { '$timezone': 'America/Toronto' },
  '$y': NaN,
  '$M': NaN,
  '$D': NaN,
  '$W': NaN,
  '$H': NaN,
  '$m': NaN,
  '$s': NaN,
  '$ms': NaN,
  '$offset': NaN,
  '$u': false
}

Expected behavior

The following should be the output:

{
  '$L': 'en',
  '$d': 2013-11-18T10:55:20.000Z,
  '$x': { '$localOffset': -60, '$timezone': 'America/Toronto' },
  '$y': 2013,
  '$M': 10,
  '$D': 18,
  '$W': 1,
  '$H': 11,
  '$m': 55,
  '$s': 20,
  '$ms': 0,
  '$offset': -300
}

Information

• Day.js Version: 1.11.6, 1.11.0, 1.10.0, 1.9.0 (it seems like the bug is in all versions since utc plugin was introduced)
• OS: [e.g. iOS]: Arch Linux
• Browser [e.g. chrome 62]: n/a
• Time zone: [e.g. GMT-07:00 DST (Pacific Daylight Time)]: tested with America/Toronto and Europe/Slovakia; I don’t think it matters;
• Node version: 19.0.0
• NPM version: 8.19.2

[UmidbekU]

I have the same problem on android.

[sys-256]

Same here. NodeJS v16.16.0 and Linux (kernel version: 6.0.5-arch1-1)

[19424056]

I have the same problem on android.

[BePo65]

Very strange; tried it on windows and on ubuntu 20.04 and in all cases my tests using @tukusejssirs code succeeded (no invalid date).

Additionally I created 3 tests in dayjs and got the same results as moment does (even here: no invalid date).

My environment was dayjs 1.11.6 on node v14.19.2 on linux, respective node 16.18.0 on windows.

[tukusejssirs]

Okay, I re-tested this with dayjs@1.11.6 and various version of node (v16.15.1+) and npm (v8.11.0+), changing versions using nvm: all succeed (i.e. no invalid date returned).

However, whenever I used the system version (installed on Arch Linux via pacman/yay), it fails. I have installed npm@8.19.2 and node@19.0.1 and it fails to produce a valid date, however, when I use the same versions installed via nvm, it succeed.

I have no idea what is the difference between them.

[19424056]

I have the same problem on android.
Day.js Version: 1.11.6
RN: 0.70.4

dayjs.extend(utc)
dayjs.extend(timezone)

dayjs.tz("2013-11-18 11:55:20", "America/Toronto") // '2013-11-18T11:55:20-05:00'
dayjs("2013-11-18 11:55:20").tz("America/Toronto") // null

please help me .

[BePo65]

@tukusejssirs so this looks more like an issue for yay.

@19424056 sorry, but I don't have an android test environment nor did I ever make developments in an android environment. Perhaps the tip from @tukusejssirs helps (installing dayjs via npm).

[19424056]

@BePo65 i try to install dayjs via npm but not work :(
dayjs("2013-11-18 11:55:20").tz("America/Toronto") // null

[galenhuntington]

The problem appears to be here:

dayjs/src/plugin/timezone/index.js

Lines 98 to 99 in 9c20e77

	const target = date.toLocaleString('en-US', { timeZone: timezone })
	const diff = Math.round((date - new Date(target)) / 1000 / 60)

The offset is calculated by converting a Date to an en-US locale string, then back again to a Date. However, the conversion back fails in some environments:

> new Date().toLocaleString('en-US', { timeZone: "America/Boise" })
'11/18/2022, 1:27:14 PM'
> new Date('11/18/2022, 1:27:14 PM')
Invalid Date

This may depend on obscure details of the OS you're running on.

For some other locales this works without issue:

> new Date().toLocaleString('zh', { timeZone: "America/Boise" })
'2022/11/18 13:28:30'
> new Date('2022/11/18 13:28:30')
2022-11-18T13:28:30.000Z

[tukusejssirs]

Thanks, @galenhuntington!

If you are right, I think the solution could be to use new Date('2022-11-18T22:00:00.000+01:00') to encode 18 Nov 2022, 22:00 in Europe/Bratislava timezone. First we would need to get the timezone offset from IANA timezone name, as Date does not accept IANA timezone name, which is quite easy (I had a similar requirement when I coded setLocalTime() function in my SO answer). I really simplified this, it might be useful to use some other parts of my setLocatTime() function in order to cover all corner cases.

/**
 * Get timezone offset
 *
 * @param      {Date}    date      Date
 * @param      {string}  timezone  Timezone
 * @return     {string}  Timezone offset
 */
function getTimezoneOffset({date, timezone}) {
  return new Intl
    .DateTimeFormat('en-US', {timeZone: timezone, timeZoneName: 'longOffset'})
    .formatToParts(date)
    .find(i => i.type === 'timeZoneName').value.match(/[\d+:-]+$/)?.[0]
}

console.log(getTimezoneOffset({date: new Date('2022-11-18T21:00:00.000Z'), timezone: 'Europe/Bratislava'}))
// Output
// '+01:00'

[rpellerin]

The issue is known and tracked there:

• https://bugs.chromium.org/p/v8/issues/detail?id=13490
• Error Date.toLocaleString() in node 19.0.0 nodejs/node#45171

NodeJS fix: nodejs/node#45573