| Flag | City | Country | School | Latitude (°) +N/-S | Longitude (°) +E/-W | Date |
 | Rio Cuarto | Argentina | Colegio Concordia | -33.149 | -64.351 | 21/03/2021 |
| Date | Gnomon height [cm] | Shadow length [cm] | Angle (°) |
| 04/10/2021 | 52.5 | -30 | -29.7 |
| 05/10/2021 | 52.5 | -27.8 | -27.9 |
| 07/10/2021 | 52.5 | -27.5 | -27.6 |
