Zephyr on the Charles continues the countdown to their 40th anniversary, bringing fellow birthday celebrators into the mix. Those born in the ninth month can head into the riverside Hyatt Regency to take 40 percent off an entrée from chef Robert Daugherty’s menu of New England fare. The mains include lobster tortellini, filet mignon and more, available for a birthday bargain during the month of September for Virgos and Libras with valid ID. Reservations can be made by calling 617.492.1234.