The schedule is tentative and will be confirmed at a later date.
| Activity | Timeline (all mentioned times are in UTC) |
|---|---|
| Leader Confirmation Deadline | Sunday, 14 March 2021 |
| Task Submission Deadline | Sunday, 14 March 2021 |
| Participant List Registration Deadline | Sunday, 25 April 2021 |
| APIO 2021 Practice Session | Friday, 14 May 2021 01:00 — Friday, 21 May 2021 01:00 |
| APIO 2021 Competition Task Translation | |
| Leaders Meeting | Friday, 21 May 2021 07:00 |
| APIO 2021 Opening Ceremony | Friday, 21 May 2021 12:00 |
| APIO 2021 Competition Window | Saturday, 22 May 2021 01:00 — Monday, 24 May 2021 01:00 |
| Unofficial Result | Monday, 24 May 2021 05:00 |
| Appeal | Monday, 24 May 2021 05:00 — Tuesday, 25 May 2021 05:00 |
| APIO 2021 Open Contest | Monday, 24 May 2021 05:00 — Wednesday, 26 May 2021 05:00 |
| APIO 2021 Closing Ceremony | Wednesday, 26 May 2021 12:00 |
| Official Result | |
| Open Contest Result |