I am creating a registration form that will be automatically emailed to an employee at a certain time when they are in for their shift. I have researched around and can't find anything like this created before. Is this possible for SharePoint using Nintex workflow?

I will need to ensure this form can be emailed to the employees at the start of shift so that they do not have to go out of their way to complete the task. Ideally, I want the registration data to be saved in a form or calendar so that it can be referred to. 

I have played around with this however I have struggled with sending tailored emails to individuals at the specific times they are in. 

Any help anyone can provide me will be appreciated!

Thanks, Martin