Gangale asali ya zaɓi ƙarshen 1975 a matsayin zamanin kalandar don girmama shirin Viking na Amurka a matsayin farkon nasarar nasarar (Amurka) mai sauƙi zuwa Mars (a baya 1971 Soviet Mars 3 Landing ya ba da bayanai na dakika 15 kawai daga farfajiyar duniyar). A shekara ta 2002 ya karɓi Telescopic Epoch, wanda Peter Kokh ya fara ba da shawara a 1999 kuma Shaun Moss ya karɓa a 2001 don Kalandar Utopian, wanda yake a cikin 1609 don girmamawa ga amfani da Johannes Kepler na Tycho Brahe na Mars don bayyana dokokin motsi na duniya, da kuma Galileo Galilei na farko na Mars tare da kallo. Zaɓin Telescopic Epoch ta haka ne ya haɗa tsarin D da kalandar Utopian, kasancewar bambance-bambance na nomenclatural. Har ila yau, yana kauce wa matsala da yawa na abubuwan da suka gabata na shekaru 400 da suka gabata. Menene shirin Viking ya yi? Tambaya: Menene Gangale ya zaɓi ya koma ga kalandar da ba ta dace ba?
Shekara ta 1975