30 November–28 December 2025: Shake Shack Singapore Chicken Sundays: Free Chicken Shack Promotion Islandwide by JR 3/Dec/2025 Shake Shack Singapore is offering a free Chicken Shack with every chicken sandwich purchase made on Sundays via Happy Point until 31 December 2025. This limited-time promotion provides excellent value for diners seeking a satisfying weekend treat. Read more
