To show different content in your emails during a sale or a set period, use a Smart Rule with the Scheduled event filter.

  1. Open the email and click the block you want to change
  2. Under Smart Rules, click Add Smart Rule
  3. Click Create New Rule
  4. Click Add filter, select Scheduled event, and set the From and To dates
  5. Click Save & Apply
  6. Click the + under the rule and add the content to show during that period
  7. Click Save Changes

Your original block shows again when the To date passes.

For the full steps, see How to use Smart Rules in your emails.