How to read date codes

Messages
434
Location
MD
Can anyone tell me how to read the date from the codes on the Valvoline DuraBlend bottles?? I have two codes from 6 different quart bottles. Four of the quarts read C028C1-1644 and the other two are B239C1-1941. Thanks for any help.
 
Messages
1,093
Location
Kentucky
C028C1-1644=Marc, 2, 2008, 4:44 PM B239C1-1941=February 23, 2009, 7:41 PM I forget where C1 is but it might be Cincinnati, Ohio.
 
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