Kelvinator Furnace age?

I can not find the age of the furnace, any help would be great.
I think it is the 10th week of 2009

serial number KGD100902652



Good guess…but…

it’s backwards.

2010 and September…

Thanks, it would be nice if all of the manufacturers would just put a born on date instead of mixing things up with orders and letters.

Thank you