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## Orders and events — clarified formats and behaviour

* **Order dates.** `createdAt` and `updatedAt` on [Managing the status of the order](/reference/create-order) and [Create orders in batch](/reference/create-batch-order) now state that dates must be in UTC ending in `Z`. Fractional seconds are accepted. Timezone offsets such as `+01:00` are rejected.
* **Order `metaInfo`.** Values can be strings, numbers or booleans, and RFC 3339 strings are stored as dates. The example now shows mixed value types.
* **Order updates.** Each call is stored as a new entry for the order rather than replacing the previous one, so [Get order details](/reference/get-orders) can return several entries with the same `id`. Orders sent to the single-order endpoint are processed as live data. To import past orders without triggering workflows, use the batch endpoint with `historical: true`.
* **Events.** [Create an event](/reference/create-event) and [Create events in batch](/reference/create-batch-events) store every event as a custom event, including `cart_updated`, `cart_deleted` and `order_completed`, so they don't trigger ecommerce automations. To send ecommerce cart events, activate the ecommerce app and use the Brevo tracker or the [trackEvent endpoint](/docs/track-custom-events-rest).
* **Guides.** [eCommerce tracker events](/docs/ecommerce-and-tracker-events) now explains how cart and order events are processed depending on the endpoint, and documents the payloads for `cart_updated` and `cart_deleted` and how to record purchases. [Track website activity](/guides/track-website-activity) now recommends recording purchases with the Orders API. [Track custom events (REST)](/docs/track-custom-events-rest) uses a custom event in its example instead of the reserved `cart_updated` name.