If there's one thing I've learned from working in email marketing, it's that the brands who perform best during peak trading periods aren't the ones sending the most emails in the final week. They're the ones who started planning months earlier, built a considered calendar, and arrived at the big moments with a warm, engaged audience already in their corner.
Peak periods like Black Friday, Christmas, Valentine's Day, Mother's Day and Father’s Day represent some of the biggest revenue opportunities of the year for retail brands. But they're also some of the most competitive moments in a subscriber's inbox. Getting your email calendar right, and getting it right early, is what separates a campaign that converts from one that gets lost in the noise.
Here's how I approach it.
Map the Full Year, Not Just the Peaks
The first thing I do when planning an email calendar is zoom out. It's tempting to focus immediately on Black Friday or Christmas, but peak periods don't exist in isolation. They sit inside a broader trading calendar, and what you do in the quieter weeks shapes how well your audience responds when the high-value moments arrive.
I plot the full year across a simple spreadsheet or planning doc: key trading dates, any seasonal product launches, sale periods, and quieter windows. For a UK retail brand, that typically includes:
- January sales and new year messaging
- Valentine's Day
- Mother's Day
- Easter and spring campaigns
- Father’s Day
- Summer sale
- Back to school
- Black Friday and Cyber Monday
- Christmas and gifting season
- Boxing Day sale
Once everything is mapped out, you start to see the natural rhythm of the year, and, crucially, where the breathing space is. Those quieter periods are not dead time. They're your opportunity to warm up your list, build brand affinity, and test creative before the pressure of peak kicks in.
Work Backwards from Each Key Date
For every major peak period, I work backwards from the deadline and build out a communication arc. Most brands think about peak campaigns in terms of the send date, but the planning needs to begin much earlier than that.
Take Black Friday as an example. By the time you're in mid-November, you should already know your offer, have your creative briefed, and have started building audience segments based on engagement data from earlier in the year. The send itself is almost the easy part.
A typical arc for a peak period might look something like this:
- Six to eight weeks out: finalise your offer strategy, brief creative, and confirm any automation flows that need updating
- Four weeks out: begin pre-peak engagement activity, warming up your list with relevant content, product focus, or early access hints
- Two weeks out: ramp up frequency for engaged subscribers; consider a segmented early access send for VIPs or loyal customers
- Peak week: campaign sends, abandoned browse and cart flows active, post-purchase sequences live
- Post-peak: review, learn, and plan for what comes next
The specifics will vary depending on the period and the brand, but the principle is the same: early planning gives you options. Late planning forces compromises.
Protect Your List Health in the Run-Up
One of the things I'm always conscious of is how peak periods can damage list health if they're not handled carefully. Sending at high frequency to an unengaged segment might inflate your send numbers, but it will hurt your deliverability, your open rates, and your brand perception in the process.
In the weeks before a major peak, I focus on re-engagement campaigns for lapsed subscribers, suppression of chronically unengaged contacts, and making sure that the audience I'm sending to is genuinely interested. A smaller, warmer list will always outperform a large, disengaged one.
It's also worth reviewing your welcome and post-purchase flows before peak hits. If a surge of new subscribers comes in through a pre-Black Friday sign-up form or a Christmas gifting purchase, you want those automated sequences to be doing their job properly.
Build in Flexibility
Even the most carefully planned calendar needs room to flex. A competitor might announce an unexpected promotion. A product might sell out. A news moment might make a scheduled send feel poorly timed. I always try to leave a little white space in the calendar around peak periods rather than planning sends wall to wall, because that space is what allows you to respond when something changes.
It's also worth noting that not every brand needs to participate in every peak period. If Valentine's Day isn't relevant to what you sell, or if your customers don't typically shop for gifts, forcing a campaign can feel inauthentic and wastes resource you could invest elsewhere. Be selective. Double down on the peaks that actually matter for your audience.
Review and Carry the Learnings Forward
After every peak period, I run a review: what performed, what didn't, what we'd do differently. This sounds obvious, but it's genuinely one of the most valuable parts of the process, and one that often gets skipped when the team is immediately pivoting to the next campaign.
Those post-peak learnings feed directly back into the planning for the following year. Subject line tests, segment performance, send timing data: all of it builds up into a clearer picture over time of what your audience actually wants to hear from you, and when.
Planning an email marketing calendar around peak trading isn't about having every send mapped out eighteen months in advance. It's about giving yourself enough runway to be strategic rather than reactive, and arriving at the moments that matter with the right message for the right audience. That's when email really earns its place.
Want Help with Your Email Marketing?
If you're looking at your trading calendar and not quite sure where to start, we'd love to help. At I-COM, we work with brands to build email strategies that are planned properly, executed well, and actually move the needle. Whether you need support with campaign planning, Klaviyo, or a full email marketing strategy, get in touch and let's have a conversation. Fill out the contact form below!
