Turning th' accomplishment of many years

  Into an hour-glass…    (Shakespeare, Henry V, Act 1, Prologue)

Date -

Event

01. Jan -

Big Bang, as seen through cosmic background radiation

11 May -

Milky Way Galaxy formed

01. Sep -

Sun formed (planets and Earth's moon soon thereafter)

16. Sep -

Oldest rocks known on Earth

Sep -

First life (prokaryotes)

12 Oct -

Photosynthesis

29 Oct -

Oxygenation of atmosphere

08. Nov -

Complex cells (eukaryotes)

5 Dec -

First multicellular life

14 Dec -

Simple animals

14 Dec -

Arthropods (ancestors of insects, arachnids)

18 Dec -

Fish and proto-amphibians

20 Dec -

Land plants

21 Dec -

Insects and seeds

22 Dec -

Amphibians

23 Dec -

Reptiles

26 Dec -

Mammals

27 Dec -

Birds

28 Dec -

Flowers

30 Dec -

Cretaceous–Paleogene extinction event, non-avian dinosaurs die out

 Dec -

Primates

31 Dec, 06:05 -

Apes

31 Dec, 14:24 -

Hominids

31 Dec, 22:24 -

Primitive humans and stone tools

31 Dec, 23:44 -

Domestication of fire

31 Dec, 23:52 -

Anatomically modern humans

31 Dec, 23:55 -

Beginning of most recent glacial period

31 Dec, 23:58 -

Sculpture and painting

31 Dec, 23:59:32 -

Agriculture

31 Dec, 23:59:47 -

First writing (marks end of prehistory and beginning of history), beginning of the Bronze Age

31 Dec, 23:59:48 -

First dynasty of EgyptEarly Dynastic period in SumerAstronomy

31 Dec, 23:59:49 -

AlphabetAkkadian EmpireWheel

31 Dec, 23:59:51 -

Code of HammurabiMiddle Kingdom of Egypt

31 Dec, 23:59:52 -

Mycenaean GreeceOlmec civilization; Iron Age in Near East, India, and Europe; founding of Carthage

31 Dec, 23:59:53 -

Kingdom of Israel, ancient Olympic games

31 Dec, 23:59:54 -

BuddhaConfucius, Laozi, Qin DynastyClassical GreeceAshokan EmpireVedas completed, Euclidean geometry, Archimedean physics, Roman Republic

31 Dec, 23:59:55 -

Ptolemaic astronomy, Roman Empire, Jesus, invention of numeral 0

31 Dec, 23:59:56 -

MuhammadMaya civilizationSong Dynasty, rise of Byzantine Empire

31 Dec, 23:59:58 -

Mongol EmpireCrusadesChristopher Columbus voyages to the Americas, Renaissance in Europe

31 Dec, 23:59:59 -

Modern science and technology, American RevolutionFrench revolutionWorld War IWorld War IIApollo Moon landing, You! :-)

   
h.a. after:   http://en.wikipedia.org/wiki/Cosmic_Calendar