You can set up an automatic multi-channel birthday workflow in eSputnik.
For example, a customer will receive sale SMS or mobile push before the party, and on his birthday he will receive a birthday congratulations letter.
Gather more data about your subscribers — and you will get more occasions for a personalized newsletter. Gather more data about your subscribers — and you will get more occasions for the personalized newsletter. Just like a birth date, you can use the wedding anniversary and other memorable dates.