The following links are for events and conferences related to astronomy and planetary sciences, including astrobiology topics to some extent.
All Highlighted Events (since August 2012)
Formation, Detection, and Characterization of Extrasolar Habitable Planets. August 27-31, 2012. Beijing, China
Life in the Cosmos Workshop. September 5-6, 2012. Washington, DC, USA
2nd International Congress of Astrobiology. September 24-28, 2012. Medellín, Colombia
4th IAA Symposium on Searching for Life Signatures. September 25-27, 2012. San Marino, Italy
44th Annual Meeting of the Division for Planetary Sciences of the AAS. October 14-19, 2012. Reno, Nevada, USA
12th European Workshop on Astrobiology (EANA’12). October 15-18, 2012. Stockholm, Sweden
Workshop of Astrobiology. October 18-20, 2012. Aveiro, Portugal
Hot Planets and Cool Stars. November 12-16, 2012. Garching, Germany
AGU Fall Meeting 2012. December 3-7, 2012. San Francisco, California, USA
221st AAS Meeting. January 6-10, 2013. Long Beach, California, USA
The Present-Day Habitability of Mars. February 4-6, 2013. Los Angeles, California, USA
Exoplanets in Multi-body Systems in the Kepler Era. February 9-16, 2013. Aspen, Colorado, USA
Characterising exoplanets: detection, formation, interiors, atmospheres and habitability. March 11-12, 2013. London, UK
44th Lunar and Planetary Science Conference. March 18–22, 2013. Woodlands, Texas, USA
From Stars to Life. April 3-6, 2013. Gainesville, Florida, USA
Molecules and Life in Extremes. April 17-19, 2013. Edinburgh, UK
Habitable Worlds Across Time and Space. April 29 - May 2, 2013. Baltimore, Maryland, USA
NAI Workshop Without Walls on Hadean Earth-Moon System. May 20-21, 2013. Virtual
Exoplanets in the Post-Kepler Era. May 20-21, 2013. Massachusetts, USA
222nd AAS Meeting 2013. June 2-6 , 2013. Indianapolis, Indiana, USA
1st International Workshop on Education in Astrobiology. June 6-9, 2013. Höör, Sweden
Open Yearly Meeting of the Nordic Network of Astrobiology. June 11-14, 2013. Höör, Sweden
Astrobiology "Grand Tour". June 20, 2013. Australia
Crossing the Boundaries in Planetary Atmospheres: From Earth to Exoplanets. June 24-28, 2013. Maryland, USA
International Symposium on Planetary Sciences (IAPS2013). July 1-4, 2013. Shanghai, China
Australian Astrobiology Meeting. July 4, 2012. Sydney, Australia
PLATO 2.0 Science Workshop. July 29-31, 2013. ESTEC, Noordwijk, The Netherlands
Impacts and their Role in the Evolution of Life. August 16-25, 2013 Kuressaare, Estonia
Instruments, Methods, and Missions for Astrobiology XVI. August 25-29, 2013. San Diago, California, USA
European Planetary Science Congress 2013. September 08–13, 2013. London, United Kingdom
45th Meeting of AAS DPS. October 6-11, 2013. Denver, Colorado, USA
International Biogeoscience Conference. November 1-4, 2013. Nagoya, Japan
Kepler Science Conference II. November 4-8, 2013. Moffett Field, CA, USA
223rd AAS Meeting. January 5-9, 2014. Washington, DC, USA
Search for Life Beyond the Solar System. March 17-21, 2014. Tucson, Arizona, USA
Origins 2014. July 6 - July 11, 2014. Nara, Japan
All International Events from Various Sources
NASA Solar System Launches and Events Calendar (very good).
Local Events