You can create a link to your Rezgo website that will bring up an option pre-selected on a specific date.
The link should be formatted as follows:
In this example, http://mydomain.rezgo.com/details/1234/example-item/ is the item's full link.
Next, include the option's SKU, found on the option's details page. In this example, the SKU is 15020.
Finally, include the full date you want to link, in YYYY-MM-DD format.