Publish Dates

I have a client that uses WP. He posts up 5-10 posts at a time, 1 for each day and into the future. IE: He would post for today and the next five days. Then MailChimp gets the RSS feed every day looks at the publish date and sends an email with the Blog Post to 1000 subscribers. We have been doing this for 4 years, now looking to possibly use Duda. The issue is it seems Duda does not allow us to set a publish date in the future. Does anyone have any thoughts on this?