A look back on seasonal trends, email activity and standout B2C marketing:Start to finish: The first reference to Halloween was on Aug. 9. The final reference was on Nov. 3.The biggest day for Halloween emails was Halloween itself, Monday, Oct. 31. Retailers sent the majority of their Halloween-themed emails after Oct. 9.View this chart larger.Most interesting emails: Sears regularly runs “Midnight Madness” campaigns offering discounts that start in the evening and end at midnight. They recognized that these campaigns would be a great fit for Halloween, sending the following email on Oct.

