...
| Nominal start date (operational systems) | Météo-France | Met Office(a) | DWD | BOM | CMCC | Nominal start date (discontinued systems) | ECMWF | Met Office (a) | ECCC |
|---|---|---|---|---|---|---|---|---|---|
| System 9 (system=9) | GloSea6 (system=604) | GCFS2.2 (system=22) | ACCESS-S2 (system=2) | SPS4 | System 4 (system=4) | GloSea5-GC2-LI (system=15) | GEM-NEMO (system=1) | ||
| January |  | | | | | January | |  (c) | |
| February | | | | | | February | | | |
| March | | | | | | March | | | |
| April | | | | | | April | | | |
| May | | | | | * | May | | | |
| June | | | | | | June | | | |
| July | | | | * | | July | | | |
| August | | | | | * | August | | | |
| September | | | | | | September | | | |
| October | | | | | | October | | | |
| November | | | | | | November | | | |
| December | | | | | | December | | | |
...