Answer:
The original issue date is printed at the bottom right corner of the license under the title ISS, as shown in the diagram below.
Notes:
The issue date is writen in the form xx/xx/xxxx as shown in figure 1.
For example, 05/20/2010 is May 20, 2010.
Some licenses may display the issuance date in the middle part of the bottom of the license in the form xx/xx/xxxx , followed by three other fields yyy yy/yy yy/yy, as shown in figure 2.