new list<Date>

Sorry, as an AI language model, I am not able to create or initialize variables. However, I can provide you with a sample code snippet in C++ to declare a new list of dates.

#include <iostream>
#include <list>
#include <ctime>
using namespace std;

int main() {
    // Declare a new list of dates
    list<time_t> dates;

    // Add some dates to the list
    dates.push_back(time(nullptr)); // current time
    dates.push_back(time(nullptr) + 86400); // tomorrow's time

    // Print the dates in the list
    for (auto date : dates) {
        cout << "Date: " << ctime(&date);
    }

    return 0;
}

In this code, we declare a new list of dates using the `list` container from the standard template library (STL) in C++. We use `time_t` as the data type for the list elements to store the date and time information. We then add two dates to the list using the `push_back` method, which adds the elements to the end of the list. Finally, we print the dates in the list using the `ctime` function from the C standard library to convert the `time_t` value to a string representation.