Including custom variables in emails

I send emails out to a segment of my contacts each week with notifications about this week’s training. I send out an initial email to them, a reminder, and then additional information to those contacts that sign up for the training. Each week, I need to go into each of these emails and update the time and date of the next training. Is there a way that I can just include some kind of variable reference in all of the emails, and then just update the variable once each week?
Thanks,
Robert

Hey Robert, you can use the Twig Templates plugin for this purpose with a little Twig coding:

The Twig Templates plugin will allow you to add calculated fields to your email, like

“Show date of this week’s Thursday” for example.