Here’s what I recommend: Put the name of your ezine in brackets at the beginning of your subject line. This tells receivers it’s a newsletter. Put the main subject of the newsletter after the newsletter name — not just the month. When people know the content of the newsletter, they’re more likely to open and read it than if it’s just a date.

If the name of your newsletter is long, think of a way to shorten it for purposes of the brackets. You’re looking to get your subject line as close to about 35 characters as you can, and having a super-long newsletter name can take up a lot of those characters.