I'm trying to map member fields in CartThrob, and I'm having trouble with Birthday.

{customer_bday_m} displays {customer_bday_m}
{customer_bday_month} (as shown in docs) displays nothing.

There are no options for the birthday day, month and year fields in the CT settings page.

Am I missing something?

2 Answers 2


Are you trying to store custom data on member save or checkout? If so, you will need to add custom_data[custom_field_name] as the name for the input.

I don't see anything in their docs about birthdays?

You may want to use Profile:Edit along with CartThrob as it can save customer data to your member channel entries automatically.

  • The docs page I'm talking about is cartthrob.com/docs/tags_detail/save_customer_info_form/… where you can see bday_month, bday_day and bday_year. I'm trying to save the data. My other fields are something like <input type="text" name="first_name" value="{customer_first_name}" /> and work perfectly. Commented Dec 4, 2012 at 18:51
  • I'm not positive but that data might be specific for certain gateways, not specific to EE members. Does {custom_data:bday_month} work?
    – Siebird
    Commented Dec 4, 2012 at 19:04
  • It doesn't show anything. This might need to be a feature request for CT... to allow birthday fields to be mappable in the member settings. Commented Dec 4, 2012 at 19:55
  • I didn't save the birthday fields because I suppose it's not supported. However your answer is technically correct so I'll mark it as accepted. Commented Dec 15, 2012 at 22:25

You might also try the EE's native bday_m, bday_d, and bday_y fields. The documentation only mentions the combined {birthday} tag, but the month / day / year values are stored separately in the database and are accessible via {bday_m}, {bday_d}, and {bday_y}.

To use these tags, you must be within {exp:member:custom_profile_data}, or you could use an alternative, such as Profile:edit ($49, mentioned by @Siebird above).

I know this answer isn't specific to CT, but it may accomplish what you're after.

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