The first single arrow means bullet mark 1) and second double arrow means bullet mark 2). Hence if you read the binary digits anti-clockwise it is as follows starting from single arrow
> 0010, 1100, 1010, >> 0010, 0010, 0001, 0010, 1101,
In the decimal system this is
> 2, 12, 10, >> 2, 2, 1, 2, 13
Hence it reads as
>2-12-10 >> 22-12-13
It means dates between 2-Dec-2010 and 22-Dec-2013.
The shaded and non shaded triangles along with the tiny 6 dark triangles should mean what would happen between these periods
> 0010, 1100, 1010, >> 0010, 0010, 0001, 0010, 1101,
In the decimal system this is
> 2, 12, 10, >> 2, 2, 1, 2, 13
Hence it reads as
>2-12-10 >> 22-12-13
It means dates between 2-Dec-2010 and 22-Dec-2013.
The shaded and non shaded triangles along with the tiny 6 dark triangles should mean what would happen between these periods