I want to set up a few recurring email campaigns - nothing crazy, just a meeting reminder that is sent on specific dates. These meetings are not HL events, they are scheduled in my google calendar and are already created with people invited. One series happens on the first Tuesday of every month, and I want to send a reminder 1 day before and 1 hour before. The other series is bi-weekly on Wednesdays. There are a couple of exceptions in both where we move them to a different week due to holidays.

I don't find that I can build a workflow to accommodate the dates without making it very complicated (e.g. it's not always a 28-day or 14-day wait). The easiest solution would be to set up an email campaign to send on schedule, but I can only do that one at a time. It is the same email message every time, so if I could choose a series of dates to schedule the campaign that would be the simplest way to achieve.