The Geologic Calendar is a scale in which the geological lifetime of the Earth is mapped onto a calendrical year; that is to say, the day one of the Earth took place on a geologic January 1 at precisely midnight, and today's date and time is December 31 at midnight. On this calendar, the inferred appearance of the first living single-celled organisms, prokaryotes, occurred on a geologic February 25 around 12:30 pm to 1:07 pm, dinosaurs first appeared on December 13, the first flower plants on December 22 and the first primates on December 28 at about 9:43 pm. The first Anatomically modern humans did not arrive until around 11:48 p.m. on New Year's Eve, and all of human history since the end of the last ice-age occurred in the last 82.2 seconds before midnight of the new year.
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| - تقويم جيولوجي (ar)
- Geologic Calendar (en)
- Calendario geologico (it)
- 地球カレンダー (ja)
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| - التقويم الجيولوجي هو مقياس يتم فيه توزيع عمر الأرض على عام تقويمي؛ أي أن اليوم الأول لـلأرض حدث في 1 من يناير الجيولوجي وفي منتصف الليل تحديدًا، وتاريخ وتوقيت اليوم هو 31 من ديسمبر عند منتصف الليل. وفي هذا التقويم، نشأت الحياة على الأرض في 15 من نوفمبر وظهرت أولى الديناصورات في 27 من ديسمبر وأولى الزهور في 30 من ديسمبر وأولى الحيوانات الرئيسة في 31 من ديسمبر. ولم يصل البشر الأوائل إلا في حوالي الساعة 11:56 مساءً. وفي ليلة رأس السنة، تم تسجيل كل التاريخ البشري في آخر 4 ثوانٍ. (ar)
- 地球カレンダー（ちきゅうカレンダー）は、約46億年におよぶ地球の歴史を1年に見立て、人間の時間スケールに馴染みの深いカレンダーになぞらえたもの。地球史カレンダーや進化カレンダー、地球進化史カレンダーとも呼ばれる。 地球カレンダーでは地球誕生を1月1日の午前0時、今現在を12月31日の午後12時と仮定し、地球史上の出来事をカレンダー上の日付にプロットする。例えば、ヒトの誕生は年越しの23分前にあたる12月31日午後11時37分の出来事である。1億年がカレンダー上では約8日に換算される。カレンダー上の1日ごとに約1300万年が経過する計算になり、冥王代や原生代では1日でほぼ変化しない光景が顕生代では著しく変貌する。 なお、地球誕生ではなく宇宙誕生を1月1日として約138億年の宇宙の歴史を1年に落とし込む宇宙カレンダーもある。宇宙カレンダーにおいて地球をはじめとする太陽系の誕生は9月として扱われる。 (ja)
- The Geologic Calendar is a scale in which the geological lifetime of the Earth is mapped onto a calendrical year; that is to say, the day one of the Earth took place on a geologic January 1 at precisely midnight, and today's date and time is December 31 at midnight. On this calendar, the inferred appearance of the first living single-celled organisms, prokaryotes, occurred on a geologic February 25 around 12:30 pm to 1:07 pm, dinosaurs first appeared on December 13, the first flower plants on December 22 and the first primates on December 28 at about 9:43 pm. The first Anatomically modern humans did not arrive until around 11:48 p.m. on New Year's Eve, and all of human history since the end of the last ice-age occurred in the last 82.2 seconds before midnight of the new year. (en)
- Il calendario geologico è una nota comparazione temporale tra la vita sulla terra ed un anno solare, più volte utilizzata a livello didattico. Un'idea ripresa da Piero e Alberto Angela, che nel 1992 raccontarono in un libro la vita sulla terra. Il calendario è formato da un unico anno terrestre, ma in questo arco temporale viene compressa la vita della Terra (circa 4,5 miliardi di anni). (it)
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| - التقويم الجيولوجي هو مقياس يتم فيه توزيع عمر الأرض على عام تقويمي؛ أي أن اليوم الأول لـلأرض حدث في 1 من يناير الجيولوجي وفي منتصف الليل تحديدًا، وتاريخ وتوقيت اليوم هو 31 من ديسمبر عند منتصف الليل. وفي هذا التقويم، نشأت الحياة على الأرض في 15 من نوفمبر وظهرت أولى الديناصورات في 27 من ديسمبر وأولى الزهور في 30 من ديسمبر وأولى الحيوانات الرئيسة في 31 من ديسمبر. ولم يصل البشر الأوائل إلا في حوالي الساعة 11:56 مساءً. وفي ليلة رأس السنة، تم تسجيل كل التاريخ البشري في آخر 4 ثوانٍ. (ar)
- The Geologic Calendar is a scale in which the geological lifetime of the Earth is mapped onto a calendrical year; that is to say, the day one of the Earth took place on a geologic January 1 at precisely midnight, and today's date and time is December 31 at midnight. On this calendar, the inferred appearance of the first living single-celled organisms, prokaryotes, occurred on a geologic February 25 around 12:30 pm to 1:07 pm, dinosaurs first appeared on December 13, the first flower plants on December 22 and the first primates on December 28 at about 9:43 pm. The first Anatomically modern humans did not arrive until around 11:48 p.m. on New Year's Eve, and all of human history since the end of the last ice-age occurred in the last 82.2 seconds before midnight of the new year. A variation of this analogy instead compresses Earth's 4.6 billion year-old history into a single day: While the Earth still forms at midnight, and the present day is also represented by midnight, the first life on Earth would appear at 4:00 am, dinosaurs would appear at 10:00 pm, the first flowers 10:30 pm, the first primates 11:30 pm, and modern humans would not appear until the last two seconds of 11:59 pm. A third analogy, created by University of Washington paleontologist Peter Ward and astronomer Donald Brownlee, who are both famous for their Rare Earth hypothesis, for their book The Life and Death of Planet Earth, alters the calendar so it includes the Earth's future leading up to the Sun's death in the next 5 billion years. As a result, each month now represents 1 of 12 billion years of the Earth's life. According to this calendar, the first life appears in January, and the first animals first appeared in May, with the present day taking place on May 18, even though the Sun won't destroy Earth until December 31, all animals will die out by the end of May. (en)
- 地球カレンダー（ちきゅうカレンダー）は、約46億年におよぶ地球の歴史を1年に見立て、人間の時間スケールに馴染みの深いカレンダーになぞらえたもの。地球史カレンダーや進化カレンダー、地球進化史カレンダーとも呼ばれる。 地球カレンダーでは地球誕生を1月1日の午前0時、今現在を12月31日の午後12時と仮定し、地球史上の出来事をカレンダー上の日付にプロットする。例えば、ヒトの誕生は年越しの23分前にあたる12月31日午後11時37分の出来事である。1億年がカレンダー上では約8日に換算される。カレンダー上の1日ごとに約1300万年が経過する計算になり、冥王代や原生代では1日でほぼ変化しない光景が顕生代では著しく変貌する。 なお、地球誕生ではなく宇宙誕生を1月1日として約138億年の宇宙の歴史を1年に落とし込む宇宙カレンダーもある。宇宙カレンダーにおいて地球をはじめとする太陽系の誕生は9月として扱われる。 (ja)
- Il calendario geologico è una nota comparazione temporale tra la vita sulla terra ed un anno solare, più volte utilizzata a livello didattico. Un'idea ripresa da Piero e Alberto Angela, che nel 1992 raccontarono in un libro la vita sulla terra. Il calendario è formato da un unico anno terrestre, ma in questo arco temporale viene compressa la vita della Terra (circa 4,5 miliardi di anni). Ne consegue un'affascinante dimostrazione di quanto infinitesimale sia il tempo per come lo concepiamo noi oggi, basti pensare che soltanto negli ultimi 4 secondi di questo ipotetico anno della Terra (e cioè gli ultimi cinque secoli della nostra storia), l'uomo ha sviluppato il 99% della tecnologia che oggi noi sfruttiamo. Usando, infatti, questa scala temporale, ogni secondo del calendario corrisponde a circa 144 anni terrestri (cioè un uomo vive mezzo secondo paragonando ad un anno l'età della Terra) e ogni giorno di questo calendario corrisponde a 12.328.767 anni reali. (it)
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