Asia/Katmandu is not a valid timezone

[Summonshr]

I am from nepal. Somehow, the timezone used is Asia/Katmandu but in server we have Asia/Kathmandu. I am not sure what to do about. Fix in front-end or back-end. The Intl.DateTimeFormat().resolvedOptions().timeZone api used gives 'Asia/Katmandu' which is not right as per server valid timezones.

[pratikkuikel]

@Summonshr This is actually not an issue with this project or the php.
Php recognizes Asia/Kathmandu as timezone and not Asia/Katmandu resulting in invalid timezone.

It's actually an issue of IANA.
moment/moment-timezone#754
moment/moment-timezone#159
https://www.iana.org/time-zones

I have verified that the current timezone database of IANA has Asia/Kathmandu.
This could be due to current nodejs running in your or my system not having latest timezone db updates.
IDK

Current workaround could be adding this to the file layouts/app.blade.php before sending post request to the server.

if (timezone === 'Asia/Katmandu') {
    timezone = 'Asia/Kathmandu';
}