A “63” number plate would have been issued between September 2013 and February 2014 in the United Kingdom. The current format for UK number plates is as follows:
The first two letters represent the region where the car was registered.
The two numbers following the letters represent the year of registration.
The next letter indicates the six-month period in which the car was registered (March to August or September to February).
The final three letters are random and unique to the car.
So, a “63” number plate indicates that the car was registered between September 2013 and February 2014. After February 2014, the format changed to “14” for cars registered from March 2014 to August 2014. The format continues in this pattern each year, with “64” for September 2014 to February 2015, “65” for March 2015 to August 2015, and so on.