The machines (Cyber 960 and Cray Y-MP EL) are ready for user logons every Saturday from 12:00 - 18:00 o'clock CEST.
The Cray is available 24x7 though a operator is only available on Saturday. If you want to have them run longer, you can donate to our project and write into the description field, that your money should be used for longer operation.
Two things to find here: Local operation times (all timezones) and operator Plans

Operator Plan:
The state shown in brackets after the machine name is the current state. All machines listed will be operated on the given day.
The operator availabily shown in brackets after the operator name is a certain (positive or negative) statement from the particular operator. The operators who did not give a statement are not shown.
17. May 08: John Zabolitzky (not available), Wolfgang Stief (not available) operating: yel (up)
24. May 08: Wolfgang Stief (not available), John Zabolitzky (available) operating: cy960 (down), yel (up), majestix (down), e10k (down)
31. May 08: Wolfgang Stief (available), John Zabolitzky (available) operating: cy960 (down), yel (up), majestix (down), e10k (down)
07. Jun 08: Wolfgang Stief (available), John Zabolitzky (available) operating: cy960 (down), yel (up), majestix (down), e10k (down)
14. Jun 08: Wolfgang Stief (available), John Zabolitzky (not available) operating: cy960 (down), yel (up), majestix (down), e10k (down)

Operation times (all timezones):

GMT -11: West Samoa Time, Samoa Standard time Niue Time, Pacific/Apia, Pacific/Midway	00:00 - 06:00
GMT -10: Hawaii, Tokelau, Cook Isl., Tahiti, US/Aleutian	01:00 - 07:00
GMT -09: Alaska, Anchorage, Gambier	02:00 - 08:00
GMT -08 == PST: Dawson, Los Angeles, Vancouver	03:00 - 09:00
GMT -07 == MST: Boise, Chihuahua, Denver, Edmonton, Hermosillo, Phoenix, Arizona, Navajo	04:00 - 10:00
GMT -06 == CST: Belize, Chicago, Guatemala, Mexico City, Central Canada, Central US, Easter Island	05:00 - 11:00
GMT -05 == EST: Detroit, Havana, Jamaica, Montral, New York, Panama, Cuba, Michigan	06:00 - 12:00
GMT -04 == AST: Brabados, Dominica, Guadeloupe, Puerto Rico, Virgin, cont. Chile	07:00 - 13:00
GMT -03: Araguaina, Montevideo, Sao Paulo East Brazil, Argentine, Godthab	08:00 - 14:00
GMT -02: Noronha, South Georgia, DeNoronha	09:00 - 15:00
GMT -01: Scoresbysund, Azores, Cape Verde	10:00 - 16:00
GMT: Danmark, Madeira, Portugal, Greenwich, Zulu, England, Iceland	11:00 - 17:00
GMT +01 == CET: Germany, Netherlands, France, Belgium, Luxemburg, Spain, Italy, Poland, Switzerland	12:00 - 18:00
GMT +02: Cairo, Johannesburg, Amman, Gaza, Turkey, Israel, Egypt, Greece, Kiev, Libya	13:00 - 19:00
GMT +03: == EAT Nairobi, Baghdad, Qatar, Indian, Iran (+03,5)	14:00 - 20:00
GMT +04: Aqtau, Baku, Dubai, Samara, Mahe, Mauritius, Reunion	15:00 - 21:00
GMT +05: Afghanistan, Turkmenistan, Tajikistan, Pakistan, Uzbekistan	16:00 - 22:00
GMT +06: Vostok, Colombo, Dhaka, Omsk, Thimbu, Chagos, Rangoon	17:00 - 23:00
GMT +07: West Indonesia, Indochina, Bangkok	18:00 - 24:00
GMT +08: China, Hong Kong, Singapore, Irkutsk, Perth, Urumqi	19:00 - 01:00
GMT +09: Dili, Pyongyang, Seoul, Korea, Japan, Palau, Choibalsan	20:00 - 02:00
GMT +10: Vladivostok, Canberra, Melbourne, Queensland, Sydney, Victoria, Saipan, Yap, Tasmania, Brisbane	21:00 - 03:00
GMT +11: Magadan, Salomon, Ponape, Noumea	22:00 - 04:00
GMT +12: Antarctis, Marshall Isl., New Zealand	23:00 - 05:00