February 1: Registration opens for the National Open Exam and LEES Program

March 1: Deadline to register for the National Open Exam

March 9 – 14: Window for the National Open Exam (timing TBD by student and their proctor)

March 20: Deadline to submit Optional Supplementary Essay

April 15: Release of results from the national selection process

April 24: Registration for LEES opens

May 15: Deadline to register for the LEES Program

June 1: Invitations for LEES program sent

June 24 – July 1: USESO Training Camp (Hosted at University of Tulsa campus)

July 15 – 22: LEES Program (Hosted virtually)

August 2023: IESO (Hosted virtually, exact dates TBA)

March 2: Registration opens for the National Open Exam

March 27: Deadline to register for the National Open Exam

April 7 – 12: Window for the National Open Exam (timing TBD by student and their proctor)

May 16: Release of results from the national selection process

June 15: Deadline to register for the LEES Program

June 25 – July 2: USESO Training Camp (virtual)

July 10 – 17: LEES Program (virtual)

August 24 – 31: IESO (virtual, hosted by Italy)

April: Deadline to register for the National Open Exam

April 10 @ 11am GMT-7 (PDT): National Open Exam 

May 1: Release of results from the national selection process

June 27 – July 3: USESO Training Camp (virtual)

July 11 – July 18: Junior Program (virtual) – now LEES Program