Period of Concentration in Number Theory  
   Pacific Institute for the Mathematical Sciences. Workshops, seminars, visitors. 2003-'05.
   http://www.pims.math.ca/CRG/number/

Extensions of Hilbert's Tenth Problem  
   American Institute of Mathematics Research Conference Center, Palo Alto, CA, USA; 21--25 March 2005.
   http://aimath.org/ARCC/workshops/hilberts10th.html

JA2005  
   XXIVth Journées Arithmétiques. Marseilles, France; 4--8 July 2005.
   http://www.latp.univ-mrs.fr/ja2005/

Rational and Integral Points on Higher-Dimensional Varieties  
   Introductory Workshop for the research session. MSRI, Berkeley, CA, USA; 16--20 January 2006.
   http://www.msri.org/calendar/workshops/WorkshopInfo/301/show_workshop

Cohomological Approaches to Rational Points  
   MSRI, Berkeley, CA, USA; 7--31 March 2006.
   http://www.msri.org/calendar/workshops/WorkshopInfo/302/show_workshop

Analytic Methods for Diophantine Equations  
   Banff International Research Station, Alberta, Canada; 15--19 May 2006.
   http://www.msri.org/calendar/workshops/WorkshopInfo/303/show_workshop

Special Year in Number Theory and Combinatorics  
   Parallel programmes of conferences, colloquia and lectures. University of Florida, Gainesville, FL, USA; September 2004 - September 2005.
   http://www.math.ufl.edu/specialyears/2004-5/

Arithmetic Geometry Gainesville 2005  
   P-adic methods in arithmetic and algebraic geometry: part of the Special Year in Number Theory and Combinatorics. University of Florida, Gainesville, FL, USA; 28 February -- 4 March 2005.
   http://www.math.ufl.edu/~crew/agconf.html

Gauss-Dirichlet Conference  
   Georg-August-Universität, Göttingen, Germany; 20--24 June 2005.
   http://www.uni-math.gwdg.de/tschinkel/SS05/conference.html

Automorphic Forms and Related Topics  
   19th Annual Workshop. University of North Texas, Denton, TX, USA; 17--20 March 2005.
   http://www.smcm.edu/users/hrosson/AFW/

Analysis in Number Theory  
   Theme year with semesters on p-adic analysis and arithmetic geometry; classical analysis and analytic number theory. Centre de Recherche en Mathematiques, Montreal, Canada; September 2005 -- May 2006.
   http://www.crm.umontreal.ca/act/theme/theme_2005-2006_en/

Intersection of Arithmetic Cycles and Automorphic Forms  
   Workshop in the theme year on Number Theory and Analysis. Centre de Recherche en Mathematiques, Montreal, Canada; 12--16 December 2005.
   http://www.math.mcgill.ca/goren/Workshop.html

17th Czech and Slovak International Conference on Number Theory  
   Malenovice, Czech Republic; 5--10 September 2005.
   http://albert.osu.cz/~ntconf/

The Lichtenbaum Conjectures: Progress and Prospects  
   In honor of the 65th birthday of Stephen Lichtenbaum. Brown University, RI, USA; 18--20 March 2005.
   http://www.math.brown.edu/slicht_conf/

CANT 2005  
   Combinatorial and Additive Number Theory: A conference in celebration of Mel Nathanson's 60th birthday. CUNY Graduate Center, New York, NY, USA; 18--21 May 2005.
   http://www.theoryofnumbers.com/CANT/2005/cant_2005.htm

ArithmeTexas 2005  
   A weekend conference in number theory and related areas. Texas A+M University, College Station, TX, USA; 2--3 April 2005.
   http://www.math.tamu.edu/~map/nt/arithmetexas/

Number Theory Inspired by Cryptography  
   Banff International Research Station, Alberta, Canada; 5--10 November 2005.
   http://www.pims.math.ca/birs/workshops/2005/05w5021

Equidistribution in Number Theory  
   SMS-NATO Advanced Summer Institute. Université de Montréal, Quebec, Canada; 11--22 July 2005.
   http://www.dms.umontreal.ca/sms/44e_Session.htm

The Niven Lectures  
   Prof. Carl Pomerance. University of British Columbia, Vancouver, BC, Canada; 21--23 March 2005.
   http://www.math.ubc.ca/~boyd/niven.html

Computational Number Theory Workshop  
   Held as part of FoCM'05. University of Cantabria, Santander, Spain; 7--9 July 2005.
   http://www.math.mcgill.ca/~pila/FoCM.html

Additive Combinatorics  
   LMS meeting (5th) and workshop. University of Bristol, UK; 5--9 September 2005.
   http://www.maths.bris.ac.uk/~mabjg/bristolworkshop.html

Algebraic Geometry and Number Theory  
   Euler International Mathematical Institute, St Petersburg, Russia; 17--23 June 2005.
   http://www.pdmi.ras.ru/EIMI/2005/AG/

Probability and Number Theory 2005  
   Kanazawa Yomiuri Kaikan, Japan; 20--24 June 2005.
   http://www.math.tohoku.ac.jp/~hattori/pnt5.htm

Open Questions and Recent Developments in Iwasawa Theory  
   In honour of Ralph Greenberg's 60th birthday. Boston University, MA, USA; 13--17 June 2005.
   http://math.bu.edu/people/rpollack/greenberg.html

Multiple Dirichlet Series  
   Mount Washington Hotel, Bretton Woods, NH, USA; 11--14 July 2005.
   http://sporadic.stanford.edu/bump/mds_workshop.html

SECANTS 26  
   South of England Computational and Algorithmic Number Theory Seminar. Royal Holloway, University of London, UK; 5 March 2005.
   http://www.isg.rhul.ac.uk/~sdg/secants/secants26.html

SERMON 2005  
   South-East Regional Meeting on Numbers. University of South Carolina, Columbia, SC, USA; 15--17 April 2005.
   http://www.math.sc.edu/~filaseta/SERMON2005/SERMON2005.html

Workshop on Number Theory and Random Matrix Theory  
   Waterloo, Canada; 1--3 June 2005.
   http://www.math.uwaterloo.ca/~mrubinst/nt_rmt/