eTwinning schools (4)
| Aigio | Montcuq | Busteni | Ilion |
America (4)
| Chivilcoy | Rio de Janeiro CENOM | Rio de Janeiro Méier | Sault Sainte Marie |
On december solstice the Sun at the vertical of Capricorn Tropic at solar noon
All the measures on 20, 21 and 22 december are available
The calculations are made with the Capricorn tropic
