A little bit of a time-saver here, in the guise of a birthday range checkbox.
From Queries -> Members, you’ve been able to choose a month and day from, and a month and day to.

Well, now, you’ll see a convenience checkbox, which will automatically populate next month’s date range:

If you want something other than next month, such as the next three months, you’re still free to pull down whatever range you want. This is merely a convenience to automatically fill out those four drop-down boxes for next month.