White labs vial production date?

Ingredients
1

Howdy,

how do i determine the production date for a vial of white labs?  The experiation date on this parituclate vial is 5/14/14

Cheers,
Jeff

2

I believe it’s 4 months prior to the posted best by date

3

cool, thanks jon!

4

Yes

5

no worries. glad to help

6

Fyi - Brett strains get 6 months instead of the usual 4