When did standard packs go to 1:8 diamond chance last year?

[chuckoakland_MLBTS]

Last year, really late, the standard packs odds changed to 1 in 8. I pulled a ton, filled out some collections, etc.
Was that after the WS?
I'm sitting on some standards, I'll wait to rip if it's not too long.
Of course, no guarantee they do it again, but it was great last year.

[TheBigPapa55_PSN]

It was right after Finest.