date-fns-tz does not consider Daylight Saving Time in my country

[Mohamed-Mayallo]

My country (Egypt) has restored Daylight Saving Time after a long pause. My app now is not working properly like before because of the timezone shifting.

The timezone was +02:00 but now it is actually +03:00, however, date-fns-tz is still considering it +02:00.

[kareemotafy]

Hello, I recommend using Luxon as it works correctly!
https://www.npmjs.com/package/luxon

import {DateTime} from "luxon"

console.log(DateTime.utc().toISO())

console.log(DateTime.now().setZone('Africa/Cairo').toISO())

[valentimarco]

I have the same issue in my country(italy):

const inputFromBackend = {
    start: '14:30:00',
    end: '18:45:00',
}

// 2.
let startHours = inputFromBackend.start.split(':').map(Number)
let endHours = inputFromBackend.end.split(':').map(Number)
let time = {
    start: new Date(Date.UTC(1970, 0, 1, startHours[0], startHours[1], startHours[2])).toISOString(),
    end: new Date(Date.UTC(1970, 0, 1, endHours[0], endHours[1], endHours[2])).toISOString()
}
console.log(time)

const fullLocalTime = {
    localStart: formatInTimeZone(time.start, timeZone, 'yyyy-MM-dd HH:mm:ss zzz', { locale: itIT }),
    localEnd: formatInTimeZone(time.end, timeZone, 'yyyy-MM-dd HH:mm:ss zzz', { locale: enGB }),
}

console.log(fullLocalTime)

2024-05-21T09:20:53.902Z
Europe/Rome
{
  start: "1970-01-01T14:30:00.000Z",
  end: "1970-01-01T18:45:00.000Z",
}
{
  localStart: "1970-01-01 15:30:00 CET", 
  localEnd: "1970-01-01 19:45:00 CET",
}

localStart and localEnd should be CEST not CET!
Here the table where italy switchs timezone