2019 marks 100 years since the establishment of the International Astronomical Union. All country-members will host events to mark the anniversary. In Greece these will be coordinated by the Narional Outearch Coordinator Prof. K. Tsinganos, in collaboration with the Hel.A.S. This site will host information about ongoing and upcoming events for IAU100

• Call for proposals for the promotion of the Open Astronomy Schools (OAS) teacher training events
• Short story competition
• IAU100 Women and Girls in Astronomy Day
• 100 Years IAU: Under One Sky
• Social networks: twitter, facebook, instagram
• Prizes for participation in the 100 Hours of Astronomy Global Projet
• Participate on the 100 Hours of Astronomy Global Projet
• Events around the world
• Registered events for 100 hours of Astronomy
• National Committees