Exams I could take

Lists the exams this student may still apply for on one olympiad, with the category, the sitting, the language and the fee. The list already accounts for the student’s grade and country, the exams they have applied for, and the olympiad’s own rules about two exams on one day — so anything it returns is something add_exam_application will accept. session_date is the sitting’s calendar day (YYYY-MM-DD, no time and no time zone), and for a sitting run over more than one day, which its name shows, it is the last one; once entered, list_my_exams answers exam_date as the first day with its time_zone, and exam_start_time as the moment the sitting starts; its exam_time is the panel’s display text, a start time for some sittings and a window such as “24 Hours in GMT” for others, so it is not the start time. Pass for_application_id when looking for a replacement, so the exams that particular application may not move to are left out.