| Date | Event |
| 2/8/21 | AAT 136 Retest Order Forms Due |
| 2/9/21 | AAT 136 Retest Samples Ship |
| 2/24/21 | Annual AAR Participation Invoices shipped via USPS to your organization's Billing Contact. Please contact us if you would like an electronic copy, or if you have not received your invoice by March 11. |
| 3/1/21 | AAT 136 Retest Results Due |
| 3/15/21 | AAT 136 Retest Results Post |
| 3/1/21 | AAT 137 Enrollment Deadline for additions that require additional AAT samples (Initial Organization or Analyst Applications) |
| 3/8/21 | AAT 137 Samples Ship ~3/1/21; Contact us if your samples have not been received. |
| 3/15/21 | AAT 136 Retest Results Post |
| 4/1/21 | AAT 137 Final Enrollment Deadline for Analyst additions requiring no additional AAT samples. |
| 4/12/21 | AAT 137 Results Due |
| 4/26/21 | AAT 137 Results Post |
| 5/10/21 | AAT 137 Retest Order Forms Due |
| 5/11/21 | AAT 137 Retest Samples Ship |
| 6/1/21 | AAT 137 Retest Results Due |
| 6/8/21 | AAT 138 Enrollment Deadline for additions that require additional AAT samples (Initial Organization or Analyst Applications) |
| 6/2/21 | AAT 138 Samples Ship ~6/1/21; Contact us if your samples have not been received. |
| 6/15/21 | AAT 137 Retest Results Post |
| 7/1/21 | AAT 138 Final Enrollment Deadline for Analyst additions requiring no additional AAT samples. |
| 7/12/21 | AAT 138 Results Due |
| 7/26/21 | AAT 138 Results Post |
| 8/9/21 | AAT 138 Retest Order Forms Due |
| 8/10/21 | AAT 138 Retest Samples Ship |
| 8/31/21 | AAT 138 Retest Results Due |
| 9/1/21 | AAT 139 Enrollment Deadline for additions that require additional AAT samples (Initial Organization or Analyst Applications) |
| 9/8/21 | AAT 139 Samples Ship ~9/1/21; Contact us if your samples have not been received. |
| 9/14/21 | AAT 138 Retest Results Post |
| 10/1/21 | AAT 138 Final Enrollment Deadline for Analyst additions requiring no additional AAT samples. |
| 10/12/21 | AAT 139 Results Due |
| 10/26/21 | AAT 139 Results Post |
| 11/9/21 | AAT 139 Retest Order Forms Due |
| 11/10/21 | AAT 139 Retest Samples Ship |
| 12/1/21 | AAT 139 Retest Results Due |
| 12/1/21 | AAT 140 Enrollment Deadline for additions that require additional AAT samples (Initial Organization or Analyst Applications) |
| 12/8/21 | AAT 140 Samples Ship ~12/1/21; Contact us if your samples have not been received. |
| 12/15/21 | AAT 139 Retest Results Post |
| 12/31/21 | AAT 140 Final Enrollment Deadline for Analyst additions requiring no additional AAT samples. |
| 1/10/22 | AAT 140 Results Due |
| 1/24/22 | AAT 140 Results Post |
| 2/7/22 | AAT 140 Retest Order Forms Due |
| 2/8/22 | AAT 140 Retest Samples Ship |
| 3/1/22 | AAT 140 Retest Results Due |
| 3/15/22 | AAT 140 Retest Results Post |
