Nn3.zip May 2026

11 monthly time series used as a small-scale pilot.

The "masked" nature of the data (anonymized origin) ensures that models must rely on time series patterns rather than domain-specific knowledge. Practical Considerations nn3.zip

111 monthly time series, including the 11 from the reduced set. 11 monthly time series used as a small-scale pilot

Contestants were traditionally required to forecast 18 points into the future. nn3.zip

Includes a wide range of real-world business patterns (e.g., industry data), making it a robust test for model generalization.

The series vary in length (68 to 144 observations) and include seasonal, non-seasonal, and "difficult" patterns with outliers and structural breaks. Key Strengths