Administrative Dates & Deadlines

Please note that in case of a deadline on a particular calendar date, the time of the deadline is 11:59 PM clock time in the IAU office in Paris, France on that given date. In European winter, Paris clock time is UTC + 1 hour. In European summer, Paris clock time is UTC + 2 hours.

2026
September
Sep 15 - Feb 2		IAU Membership Application Process Opens
Sep 15		DEADLINE for Letters of Intent (LOI) for 2028 Symposia
Sep 30		Letters of Intent Published
November
Nov 1		DEADLINE for Letters of Intent to Host the IAU General Assembly in 2033 to Reach the General Secretary
Nov 15		DEADLINE for Submissions of Motions to Amend the Statutes and Bye-Laws to be Submitted to the General Secretary
Nov 15		DEADLINE for Submission of Resolutions with Financial Implications
December
Dec 1		DEADLINE for Submission of Full Proposals for 2028 Symposia
Dec 15		Draft Budget to be Distributed by the EC to the National Members
Dec 15		DEADLINE for Applications for National Membership
Dec 15		DEADLINE for Nominations for the Gruber Foundation Cosmology Prize
Dec 15		The Budget Committee shall submit, following consultation with the Offices and other relevant stakeholders as needed, a preliminary draft of the budget for the next triennium to the Finance Committee for review
Dec 15		DEADLINE for PhD Prize Application Submission
Dec 16		PhD Prize Application Submission Opens for Next Year
Dec 16		Opening for Nominations for the Gruber Foundation Cosmology Prize for Next Year
2027
January
Jan 1		DEADLINE for Items Submitted to go on the OM Agenda
Jan 8		DEADLINE for Commission Organizing Committees to submit to parent Divisions/s a report on their activities along with recommendation as to whether the Commissions should be continued for another three years, or merged with one or more other Commissions, or discontinued. WGs and Divisions should also supply tri-annual reports along with Commissions by March 15th.
Jan 31		DEADLINE for Early-Bird Registration for the General Assembly
February
Feb 2		DEADLINE to Accept Applications for IAU Membership
Feb 15		Call to Division Membership for At-Large Steering Committee Candidates
Feb 15		The General Secretary shall invite Division Presidents and the members of the Executive Committee to nominate potential members of the Special Nominating Committee (SNC)