Divide leftovers into shallow containers and refrigerate within 2 hours, or within 1 hour if the room is above 32°C (90°F). Cover and keep at 4°C (40°F) or below for up to 3 days. Alternatively, freeze at −18°C (0°F) or below and use within 3 months for best quality. Thaw frozen curry in the refrigerator. When reheating, stir and bring the sauce to a boil; check that the curry, including the chicken, reaches at least 74°C (165°F) throughout.