如何在注册表单中检测用户时区？

function getUserTimezone() {
  const timezoneOffset = new Date().getTimezoneOffset();
  const timezoneOffsetHours = -timezoneOffset / 60;
  return timezoneOffsetHours;
}

import requests

def get_user_timezone(ip_address):
    url = f"http://ip-api.com/json/{ip_address}"
    response = requests.get(url)
    data = response.json()
    return data['timezone']

function getUserTimezone() {
  const language = navigator.language || navigator.userLanguage;
  const timezone = Intl.DateTimeFormat(language, { timeZoneName: 'short' }).resolvedOptions().timeZone;
  return timezone;
}