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  2. Geologic Calendar - Wikipedia

    en.wikipedia.org/wiki/Geologic_Calendar

    The Geologic Calendar is a scale in which the geological timespan 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. [1]

  3. List of environmental dates - Wikipedia

    en.wikipedia.org/wiki/List_of_environmental_dates

    This is a list of environmental dates which are designated for creating awareness of ... 2007–2009 International Year of Planet Earth: 2008 International Year of ...

  4. 2009 - Wikipedia

    en.wikipedia.org/wiki/2009

    2009 was a common year starting on Thursday of the Gregorian calendar, the 2009th year of the Common Era (CE) and Anno Domini (AD) designations, the 9th year of the 3rd millennium and the 21st century, and the 10th and last year of the 2000s decade.

  5. Earth Day - Wikipedia

    en.wikipedia.org/wiki/Earth_Day

    Earth Day is an annual event on April 22 to demonstrate support for environmental protection.First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) [1] including 1 billion people in more than 193 countries.

  6. List of years - Wikipedia

    en.wikipedia.org/wiki/List_of_years

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us

  7. List of non-standard dates - Wikipedia

    en.wikipedia.org/wiki/List_of_non-standard_dates

    January 0 or 0 January is an alternative name for December 31.January 0 is the day before January 1 in an annual ephemeris.It keeps the date in the year for which the ephemeris was published, thus avoiding any reference to the previous year, even though it is the same day as December 31 of the previous year.

  8. List of conjunctions (astronomy) - Wikipedia

    en.wikipedia.org/wiki/List_of_conjunctions...

    Date Time UTC Planet Angle distance Planet Elongation to Sun January 18, 2009 06:19:19 Mercury 3°15' north of Jupiter 4.7° East January 23, 2009 15:34:10 Venus 1°24' north of Uranus 46.3° East January 26, 2009 18:23:39 Mercury 4°25' north of Mars 13.5° West February 17, 2009 09:35:27 Mars 35' south of Jupiter 18.8° West February 24, 2009

  9. Timekeeping on Mars - Wikipedia

    en.wikipedia.org/wiki/Timekeeping_on_Mars

    Earth Date [Mars Year/Lsº] 0: 1953-05-24: 1: ... 2009-05-21: 2008-05-25 [29/76º ... Lowell's system was not a true calendar, since a Mars date could span nearly two ...