22 December 2025 - 22 December 2025 National Mathematics Day 23 December 2025 - 23 December 2025 Atmospheric Aerosols in Extreme Environments: A Journey from the Himalayas to the Poles and Oceans 15 January 2026 - 17 January 2026 Recent Developments in Applied and Computational Mathematics (RDACM) 19 January 2026 - 23 January 2026 ISRO-ESA Heliophysics Workshop on Aditya-L1, Solar Orbiter and Proba-3 26 January 2026 - 26 January 2026 Republic Day