These are the current known observatory time allocation deadlines. If you know of a change, please email the .
Notes:
* denotes checked August/September 1997
# denotes checked August/September 2000
| Site | Deadline | Period Covered | Notes |
|---|---|---|---|
| Cerro Tololo InterAmerican Obs. | 31 Mar | Aug - Jan | * |
| 30 Sep | Feb - Jul | ||
| Mauna Kea Univ. of Hawaii |
15 Mar | Aug - Jan | * |
| 15 Sep | Feb - Jul | ||
| Isaac Newton Telescope Jacobus Kapteyn Telescope La Palma |
31 Mar | Aug - Jan | * |
| 30 Sep | Feb - Jul | ||
| Observatory of Pico dos Dias, Brazil | 30 Apr | Sep - Feb | * |
| 31 Oct | Mar - Aug | ||
| Haute Provence, France | 15 Apr | Aug - Jan | # |
| 1 Oct | Feb - Jul | ||
| Pic du Midi, France | 1 Mar | Aug - Jan | # |
| 1 Oct | Feb - Jul | ||
| Canada-France-Hawaii Telescope (CFHT) | 1 Mar | Aug - Jan | * |
| 1 Sep | Feb - Jul | ||
| Nordic Optical Telescope, La Palma | 1 Nov | Apr - Sep | * |
| 1 May | Oct - Jul | ||
| Wise Observatory, Israel | 1 Jan | Apr - Sep | * |
| 1 Jul | Oct - Mar | ||
| Nainital, India | 2 months before month of observations | ||
| European Southern Observatory, Chile | 1 Apr(?) | Oct - Mar | * |
| 1 Oct | Apr - Sep | ||
| Siding Spring Obs. (MSSSO), Australia | 21 Mar | May - Jul | * |
| 20 June | Aug - Oct | ||
| 19 Sep | Nov - Jan | ||
| 21 Nov | Feb - Apr | ||
| Mount John, New Zealand | 20 June | Aug - Oct | * |
| 20 Sep | Nov - Jan | ||
| ~15 Dec | Feb - Apr | ||
| 20 Mar | May - Jul | ||
| McDonald Obs., Texas | 1 Feb | Apr - Jul | * |
| 1 June | Aug - Nov | ||
| 30 Sep | Dec - Mar | ||
| Mt. Suhora, Poland | 20 Feb | Mar - Aug | * |
| 20 Aug | Sep - Feb | ||
| SAAO, S. Africa | 1 Jan | Apr - Jun | * |
| 1 Apr | Jul - Sep | ||
| 1 Jul | Oct - Dec | ||
| 1 Oct | Jan - Mar | ||
| SARA, Kitt Peak | 29 Mar | Jun - Dec | * |
| 29 Sep | Jan - May | ||