while it could be achievable with list workflow, it's not recommended approach since you will have plenty of running workflows just sitting and waiting for some specific date.

these kind of reminders are usually implemented by site workflow scheduled to run daily, which looks for items that should be processed on a given date.

search the forum for reminders and site workflow

https://community.nintex.com/search.jspa?q=reminders+%22site+workflow%22