AP and IB

AP is Advanced Placement. It is a program in the U.S. created by the College Board. AP offers undergraduate /college level curricula and exams to the high schoolers. Colleges and universities in the US and elsewhere may grant college credits to students who obtain high scores on the examinations. The AP curriculum for each of the various subjects is created for the College Board by a panel of experts and college-level educators. If the course is approved, the school may use the AP designation, and the course will be publicly listed on the AP Course Ledger.

AP exams are offered in May.

Here are the AP registrations.
Here are the AP exam dates.
Here are the AP score viewing dates.

IB is International Baccalaureate. IB offers four educational programs: the IB diploma program and the IB Career-related Program for students aged 15 to 19, the IB middle year program, for students aged 11 to 16, and the IB primary year program for children aged three to 12. To teach these programs, schools must be authorized by the International Baccalaureate.

IB exams are offered in May and November.