Card expiration date.
{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "#/components/schemas/CardExpiration", "title": "CardExpiration", "type": "object", "description": "Card expiration date.", "properties": { "month": { "type": "string", "description": "Two-digit expiration month.", "pattern": "^(0[1-9]|1[0-2])$" }, "year": { "type": "string", "description": "Two-digit expiration year.", "pattern": "^\\d{2}$" } } }