public static void Main()
DateOnly dateOnlyNow = DateOnly.FromDateTime(DateTime.Now);
DateTime dateTimeFromDateOnly = dateOnlyNow.ToDateTime(TimeOnly.MinValue, DateTimeKind.Utc);
DateOnly backToDateOnly = DateOnly.FromDateTime(dateTimeFromDateOnly);
Console.WriteLine(dateOnlyNow);
Console.WriteLine(dateTimeFromDateOnly);
Console.WriteLine(backToDateOnly);