This discount requirement can be used with any other discount type.

To use this discount rule, the discount requirement type should be configured as Must be assigned to birthday as displayed in the image below.

discrule-oncustomersbirthday-requirement

Once saved, the discount requirement will be added to the discount as displayed in the image below.

discrule-oncustomersbirthday-savedrequirement

That's all you need to do in order to use this discount requirement in your nopCommerce store.