On Monday, December 2, you can get Shake Shack and support Van Ness! The Navy Yard Shake Shack will donate 25% of sales from Van Ness Elementary School supporters for any meal ordered throughout the day. If you're dining in at the Shack, just mention the Donation Day at the register or input the promo code DONATE in the kiosk at checkout. If you're ordering ahead for pick-up or delivery through the Shack App or online, simply enter the promo code DONATE in the promo code section before submitting your order.