appwrite/docs/examples/1.5.x/server-graphql/examples/databases/create-datetime-attribute.md

mutation {
    databasesCreateDatetimeAttribute(
        databaseId: "<DATABASE_ID>",
        collectionId: "<COLLECTION_ID>",
        key: "",
        required: false,
        default: "",
        array: false
    ) {
        key
        type
        status
        error
        required
        array
        _createdAt
        _updatedAt
        format
        default
    }
}