Timing is critical for Black Friday email campaigns. Start your email series at least a week before Black Friday to build anticipation. Send teasers and previews to generate interest. On Black Friday itself, send multiple emails throughout the day to catch your audience at different times. Consider sending a pre-dawn email to target early-bird shoppers and a final reminder email in the evening for last-minute buyers. Don't forget to follow up with Cyber Monday offers to extend the shopping excitement.