This might be from late 2018. To track it:

- This is clearly a date in the format YYYYMMDD, which translates to January 2, 2018.

- Another date, possibly in the format YYMMDD, translating to December 31, 2018. However, given the context, it seems more likely this refers to the time 18:31 (or 6:31 PM) on January 2, 2018, rather than a date in 2018.

Which follow-up would you like?

Narrative and themes