SK Hynix DDR4 Date codes?

[SirEvan]

I've been keeping an inventory sheet of the parts that go into my file server, and one of the fields I record is MFG date.   For the dimms I have, I'm having trouble determining from the asset/date code when they were made..

 

Handle 0x0026, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x0022
        Error Information Handle: Not Provided
        Total Width: 72 bits
        Data Width: 64 bits
        Size: 16384 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMMA2
        Bank Locator: P0_Node0_Channel0_Dimm1
        Type: DDR4
        Type Detail: Synchronous
        Speed: 2133 MT/s
        Manufacturer: Hynix Semiconductor
        Serial Number: 80B18971
        Asset Tag: (Date:15/36)
        Part Number: HMA42GR7MFR4N-TF
        Rank: 2
        Configured Clock Speed: 1866 MT/s
        Minimum Voltage: Unknown
        Maximum Voltage: Unknown
        Configured Voltage: 0.003 V

For the above, I can probably guess from the asset tag, that the DIMM was MFG in the 36th week of 2015. (15/36)  However, I have another DIMM with the following info

 

Handle 0x0028, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x0022
        Error Information Handle: Not Provided
        Total Width: 72 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMMB1
        Bank Locator: P0_Node0_Channel1_Dimm0
        Type: DDR4
        Type Detail: Synchronous
        Speed: 2133 MT/s
        Manufacturer: Hynix Semiconductor
        Serial Number: 3C1F49FA
        Asset Tag: (Date:17/76)
        Part Number: HMA41GR7MFR4N-TFTD
        Rank: 1
        Configured Clock Speed: 1866 MT/s
        Minimum Voltage: Unknown
        Maximum Voltage: Unknown
        Configured Voltage: 0.003 V

This throws things out the window, since there are only 52 weeks in a year...how could it be 76th week of 2017?   Could this be days?  (76th day of 2017?)  I've searched SK Hynix's site, as well as google for SK Hynix date codes, but am coming up short.  TIA!
 

[xendrome]

Check the physical stickers on the DIMMs?

[SirEvan]

  On 25/02/2018 at 20:54, xendrome said:

Check the physical stickers on the DIMMs?

Expand  

That would require powering down the file server, sliding it out of the rack and opening it up to check   Seeing as how knowing the date isn't super necessary, would rather find out via date codes if possible   Plus I think the stickers (if i recall) only had the part/model numbers on them.