Critical Dates Zone 123
| Code | Date | Description |
| D01 | 01-Aug | All sub-association ice to be entered into Sportzsoft |
| D02 | 23-Sep | Team Confirmation of Declaration to league - U16/U19 |
| D03 | 23-Sep | Associations to submit Association blackout requests for session 1 - for home tournaments only. |
| D04 | 24-Sep | UAA Result submission from Associations to RAB |
| D05 | 28-Sep | RAB confirm UAA tier assignment |
| D06 | 28-Sep | Team Confirmation of Declaration to league - U14 and below |
| D07 | 29-Sep | Session 1 schedule distributed U16A and U19A divisions |
| D08 | 30-Sep | Association to provide RC/Zone 123 League with all team staff contacts |
| D09 | 01-Oct | Association Performance Bonds payable to League |
| D10 | 01-Oct | Session 1 begin U16A (U14AA), U19A (U16AA) - Teams be prepared to play |
| D11 | 02-Oct | Session 1 schedule distributed U14A,B,C, U19B |
| D12 | 05-Oct | Mandatory Head Coaches Meeting |
| D13 | 07-Oct | Mandatory Head Coaches Meeting |
| D14 | 09-Oct | Session 1 schedule distributed U12 and below |
| D15 | Oct 8-11 | League Blackout for Thanksgiving weekend |
| D16 | 12-Oct | Session 1 start for U14A,B,C, U16B and U19B |
| D17 | 15-Oct | Session 1 Tournament acceptance notifications for all Z123 host associations must be given to accepted teams |
| D18 | 17-Oct | Session 1 Reschedule requests from teams due to league |
| D19 | 20-Oct | Session 1 start U12 and under |
| D20 | 12-Nov | Associations to submit ice for second session league play |
| D21 | 14-Nov | Session 2 Tournament acceptance notifications for all Z123 host associations must be given to accepted teams |
| D22 | 15-Nov | League Request Deadline (Overage) |
| D23 | 15-Nov | League Request Deadline (Advance, Retreat) |
| D24 | 16-Nov | Session 2 Blackout requests from teams due to league |
| D25 | 23-Nov | U14, U16, U19 - Advance, Retreat and special requests (Overage, etc) Meeting |
| D26 | 25-Nov | Provincial Repooling meeting |
| D27 | 01-Dec | Session 2 start U16A (U14AA), U16B, U19A (U16AA) |
| D28 | 08-Dec | Session 2 start for U14A,B,C |
| D29 | 14-Dec | U12 - League Request Deadline (Advance, Retreat, Overage) |
| D30 | 15-Dec | Session 2 start U19B |
| D31 | 22-Dec | Christmas Break |
| D32 | 02-Jan | Christmas Break over |
| D33 | 03-Jan | Session 2 start U12 and under |
| D34 | 04-Feb | Last Scheduled league games for U16A and U19A **Playdowns not set |
| D35 | 11-Feb | Last Scheduled league games for U14A & U14B*one week before playdowns |
| D36 | 18-Feb | Last Scheduled league games for U16B, U14C, AA *one week before playdowns |
| D37 | 25-Feb | Last Scheduled league games for U10 and U19B |
| D38 | 07-Mar | Last Scheduled league games for U12 |
| D39 | TBD | U12 League Championships |
| D40 | TBD | AS & U10 Step 1, Step 2 and Step 3 Windup |
| D41 | One week in advance per division | Session 2 schedules distributed |