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# First Order Place Date control for Shopify Merchants

Shopify merchants can control the date that the first order of a subscription will be sent — specifically, the first order following the customer's initial checkout.

To accomplish this, set a specific custom attribute (also called a *line item property*) for each cart line item you want to control. There are two optional attributes you can set to pass this preference to Ordergroove at the time of subscription creation:

* **`og_first_order_place_date`** — the customer will be able to see this property in the line item information displayed during checkout:

  An example from the cart:

* **`__og_first_order_place_date`** — produces the same result, but the property will be hidden from the customer during checkout:

  Example from the same cart with the property hidden:

Although the custom attribute is explicitly set only for the second line item in the examples below, both line items will have the exact same behavior when it comes to setting the first order place date — assuming the first line item was properly configured.

For both options, provide the date you want the first subscription order to be placed. The value must be a string in `YYYY-MM-DD` format representing a date in the future.