What are anniversary and birthday triggers?
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Think about the last time a brand actually remembered your birthday. Not a bulk promo blast that happened to go out in March, but a real "hey, today's your day" email with a genuine offer. That's what anniversary and birthday triggers are built to do.
Anniversary and birthday triggers are time-based automated emails that fire on recurring personal dates stored in your subscriber's profile. They run once a year, automatically, without you touching anything after setup.
There are three main flavors worth knowing about.
Birthday emails go out on (or just before) the subscriber's birthday. They typically include a discount, a gift, or a free item. The key word is "typically" because plenty of brands just say happy birthday with no offer at all, and that still performs better than nothing. You need the subscriber's birth date to make this work, which means collecting it at signup or via a profile update.
Customer anniversary emails mark the date someone first subscribed or made their first purchase. These are great for loyalty messaging because you're recognizing the relationship itself, not just a purchase. "You've been with us for 3 years" lands differently than a generic discount.
Product anniversary emails fire based on when someone bought a specific item. This is especially useful for products with a natural replenishment cycle or upgrade path. A year after someone bought a mattress topper, for example, is a natural moment to ask how it's holding up.
A few practical notes on setup and data collection. Birthday and anniversary triggers only work if the date field is actually populated in your subscriber records. If you collect birth dates at signup, keep the ask short (just month and day is fine, you don't need the year) and explain what subscribers will get in return. People share personal data when there's a clear benefit. Platforms like Klaviyo, ActiveCampaign, and Brevo all support date-field triggers natively.
On timing, sending a day or two before the actual date tends to outperform sending on the day itself. It gives subscribers time to act on any offer before the moment passes. For anniversaries, sending on the exact date or a day before both work well.
These emails perform well (open rates often running 2-3x higher than standard campaigns) because they arrive at a moment of positive emotion and feel like they were meant for that specific person. That said, the offer still matters. A 5% discount on a birthday feels stingy. A free item, a meaningful percentage off, or an exclusive early-access perk feels like a genuine gift.
So one thing to watch: don't over-automate. If you're sending a birthday email, a birthday reminder, a birthday last-chance, and a birthday follow-up, you've turned a nice moment into a pressure campaign. One well-timed send is usually enough.
Now if you're mapping out your full trigger strategy, anniversary and birthday emails fit naturally alongside milestone triggers and lifecycle event triggers. Together, they cover the personal moments in a subscriber's journey with your brand.
Not sure if your current setup can handle date-field triggers cleanly? Drop us a note through our SOS hotline and we'll take a look with you.
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