Shake Shack Celebrates Christmas With a 1-for-1 Shackmas Advent Calendar

A festive green backdrop sets the tone for a limited time run of comfort favourites, highlighting daily treats designed for sharing through the year end celebrations.

Screengrab: Instagram/shakeshacksg

This holiday season, Shake Shack Singapore introduces its Shackmas Advent Calendar, a curated line up of 1-for-1 Christmas treats available exclusively via Happy Point. Running across twelve days, this seasonal campaign invites diners to enjoy familiar Shack favourites at twice the value, making festive gatherings and quiet indulgent moments feel extra rewarding.

The Shackmas Advent Calendar unfolds from 25 Dec 2025 to 5 Jan 2026, with a different treat featured every two days. Each offer is unlocked through a dedicated promo code entered at checkout on Happy Point Singapore. The promotion applies only on the specific dates stated, encouraging fans to mark their calendars and plan their visits in advance.

Image: Google Maps

From indulgent sides to classic burgers and crowd pleasing desserts, the selection reflects the brand’s most loved menu items.

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Shackmas Advent Calendar Highlights

• 25 Dec 2025 to 26 Dec 2025 1-for-1 Cheese Fries Promo code: SHACKMASCHEESE

• 27 Dec 2025 to 28 Dec 2025 1-for-1 Shack Attack Single Promo code: SHACKMASATTACK

• 29 Dec 2025 to 30 Dec 2025 1-for-1 Fifty Fifty Small Promo code: SHACKMAFIFTY

• 31 Dec 2025 to 1 Jan 2026 1-for-1 ShackBurger Single Promo code: SHACKMASSTACK

• 2 Jan 2026 to 3 Jan 2026 1-for-1 Shroom Burger Promo code: SHACKMASSHROOM

• 4 Jan 2026 to 5 Jan 2026 1-for-1 Chicken Bites six count Promo code: SHACKMASBITE

All offers are valid only through Happy Point orders, are case sensitive, and apply at participating Shake Shack Singapore locations. Each promo code is limited to one use per order and cannot be combined with other promotions.

Locate your nearest Shake Shack outlets here!