I set the Send Emails Later date to the current date and It didn't send it yesterday

I made an email responder yesterday that i want to actually go out to the full list of people yesterday. So I set the Send on a later date to the current date. It didn't send it yesterday though. How can I do this? Do I need to choose the Send date as at least one day later than I made the email?

If you update or edit the email autoresponder, the effect will be on the next submissions and not on the old/previous submissions. 

I hope this information helps. Let us know if you need further help.