using System;

​

public class Program

{

    public static void Main()

    {

        var today = DateTime.UtcNow;

        var yesterday = today.AddDays(-1);

        var beforeDate = new DateTime(yesterday.Year, yesterday.Month, yesterday.Day, 0, 0, 0);

        Console.WriteLine(beforeDate);

        var tableName = $"ArchiveCharges{beforeDate.ToString("MMM")}{beforeDate.ToString("YY")}";

        Console.WriteLine(tableName);

    }

}