Events in google calendar from google spreadsheet?

Question

Google Calendar

We in the company need a simple solution to notify employees about customers' birthdays.
The choice fell on Google Spreadsheets + Google Calendar.

A solution was found: https://ignatov-script.blogspot.com/2017/04/google...

The solution works, BUT!
Events in the calendar creates for some reason the previous day.

Can you please tell me how to fix this?
Code used for google spreadsheets:

function saveBirthdays() {
  var sheet = SpreadsheetApp.getActiveSheet();
  var data = sheet.getDataRange().getValues();
  var calname = CalendarApp.getCalendarsByName("Дни рождения клиентов");
  if (calname.length > 0) 
{
   var currentCalendar = calname[0];
}
  else 
{
   var currentCalendar = CalendarApp.createCalendar("Дни рождения клиентов");
}
  var events = currentCalendar.getEvents(new Date(2020,01,01),new Date(2023,01,01));
  for (var j = 0 ; j < events.length; j++)
{
   events[j].deleteEvent();
}
  for (var i = 1; i < data.length; i++) 
{
   var Data = new Date(data[i][1]);
 var now = new Date().getMonth(); 
   var month = now+1; 


   if ((Data.getMonth()<=month)&&(Data.getMonth()>=month-1)){
   var Name = data[i][0];
   var Phone = data [i][2]; 
   var event = currentCalendar.createAllDayEventSeries("Сегодня "+Name+" празднует день рождения. Не забудь поздравить \n"+", номер(-а) телефона: "+Phone,Data,CalendarApp.newRecurrence().addYearlyRule());
   
    event.addEmailReminder(0);
    event.addPopupReminder(0)
    }
  }
}

Answer 1

Solution found.
It is necessary to enable the display of appsscript.json in the editor in the project settings
In the editor, change the time zone to the desired one