function sendCalendarReminders() {
  const calendarId = 'primary';
  const now = new Date();

  // Только события, начинающиеся через 2 часа ±1 минута
  const windowStart = new Date(now.getTime() + 2 * 60 * 60 * 1000 - 60 * 1000); // -1 минута
  const windowEnd = new Date(now.getTime() + 2 * 60 * 60 * 1000 + 60 * 1000);   // +1 минута

  const excludeEmails = [
    'nick@kotleron.com',
    'nikita.s.rozhkov@gmail.com'
  ];

  const events = CalendarApp.getCalendarById(calendarId).getEvents(windowStart, windowEnd);

  if (events.length === 0) {
    Logger.log('Нет событий, начинающихся ровно через 2 часа.');
    return;
  }

  events.forEach(event => {
    const guests = event.getGuestList();
    const eventTitle = event.getTitle();
    const eventStartTime = event.getStartTime();

    const subject = `Quick check-in: Our upcoming meeting "${eventTitle}"`;

    const message = `
Hi there,

Just a quick note to confirm our upcoming meeting "${eventTitle}" scheduled for ${eventStartTime.toLocaleTimeString()} (Pacific Time).

Let me know if anything changes or if you need to reschedule — happy to adjust.

Looking forward to chatting with you!

Best,  
Ely Amanova  
Co-Founder, UTXORD
    `;

    guests.forEach(guest => {
      const emailAddress = guest.getEmail().toLowerCase();

      if (excludeEmails.includes(emailAddress)) {
        Logger.log(`Пропущен (в списке исключений): ${emailAddress}`);
        return;
      }

      // Отправка письма
      GmailApp.sendEmail(emailAddress, subject, message);
      Logger.log(`Отправлено: ${emailAddress}`);
    });
  });
}