I collect customer’s birthday when signing up in order to send birthday email from Klaviyo.
I created custom sign up form like below by Liquid, but I don’t know how to sync these’s custom notes to Klaviyo’s custom property.
<input name=”customer[note][birthday]” type=”date”>
How can I do that?
Registered like below.
![](https://uploads-us-west-2.insided.com/klaviyo-en/attachment/c27bdffc-b99e-4655-ac85-39ac60e266b4.png)
Best answer by Manny Singh
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