Deciphering the date code

[Topcat]

How do you tell when something was made? For example a part will have a 4 digit number on it like 2509. So what would be the day and month? I know its something like the 2 thousandth 500 and 9th day beginning from...
1960? 1970?

What is the beginning time line they all start with?

[hemiken]

Hey TC.............

Sometimes, depending on the part it will be the 250th day of 1969 = 2509

[Topcat]

Thanks Kenny. 

[Alaskan_TA]

You can see some different date code examples here;


http://www.hamtramck-historical.com/dateCodes101.shtml

[Topcat]

Good stuff. Thanks Barry. 

[Carlwalski]

Or decode it online - http://lightningjar.com/decoders/10k_day_calendar/