# E15062 — WhatsAppContactBirthdayInvalid

A contact card's birthday is not a date.

- **HTTP status**: `422`
- **Type**: `validation_error`
- **Name**: `WhatsAppContactBirthdayInvalid`

## What to do

Send birthday as YYYY-MM-DD, naming a date the calendar holds. A card showing a date that does not exist reaches the recipient looking like a bug in your data.

## Related

- [E15xxx — WhatsApp sending & delivery](/docs/api/errors/E15xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`