टाइमज़ोन कनवर्टर - विश्व समय और DST तुलना ऑनलाइन

// Convert time between timezones
function convertTimezone(date, toTimezone) {
  const formatter = new Intl.DateTimeFormat('en-US', {
    timeZone: toTimezone,
    year: 'numeric',
    month: '2-digit',
    day: '2-digit',
    hour: '2-digit',
    minute: '2-digit',
    second: '2-digit',
    hour12: false,
  });
  return formatter.format(date);
}

// Get timezone offset string
function getTimezoneOffset(timezone) {
  const formatter = new Intl.DateTimeFormat('en-US', {
    timeZone: timezone,
    timeZoneName: 'longOffset',
  });
  const parts = formatter.formatToParts(new Date());
  return parts.find(p => p.type === 'timeZoneName')?.value || 'UTC';
}

// Get current time in multiple timezones
const timezones = ['America/New_York', 'Europe/London', 'Asia/Tokyo'];
const now = new Date();
timezones.forEach(tz => {
  console.log(`${tz}: ${convertTimezone(now, tz)} (${getTimezoneOffset(tz)})`);
});
// America/New_York: 02/04/2026, 10:30:00 (GMT-05:00)
// Europe/London: 02/04/2026, 15:30:00 (GMT+00:00)
// Asia/Tokyo: 02/05/2026, 00:30:00 (GMT+09:00)