My list (always provisional):

1990s Fall of the Berlin Wall and reunification of Germany; 1992 Olympic Games; I begin my conworlding work; the EEC becomes the EU (although it was fucked up in the following years); CERN and the World Wide Web; cool things on space research (Space Station; Mars probes; discovery of dark matter...); 24 hours news; bollycao; videogames (Lucas Arts & SCUMM; Indiana Jones and the Fate of Atlantis; Day of the Tentacle; SimCity 2000; Civilization II...); movies (Jurassic Park; Terminator 2; Demolition Man (Sandra Bullock, for that matter), ...); TV (The Fresh Prince of Bel-Air; Friends; Teenage Mutant Ninja Turtles; Dragon Ball; Dr. Slump; Beakman's World; Club Super 3......); Petronas Twin Towers.
1890s Modernisme (Catalonia: El Cau Ferrat; Els Quatre Gats; Ramon Casas' Fi de segle XIX and Ramon Casas i Pere Romeu en un automòbil; Puig i Cadafalch's Casa Amatller; etc.); La Belle Époque; steam engines, aircrafts, automobiles and motion pictures; Nikola Tesla's research (middle years); Arthur Evans' first steps into discovering the Minoan civilization and first excavations at mesa Vouno (Santorini).
1790s Daniel McGinnis and the mistery of Oak Island.
1490s Publication of Tirant lo blanc; Leonardo da Vinci doing some cool research and paintings; coffee begins its epic travel to our homes.
1390s The Chinese invent toilet paper (really? well, who else).
1290s The year without winter; birth of the Swiss Confederation; beginnings of the Anglo-Portuguese Alliance (officialy signed in 1373, though); Marco Polo returns to Venice from China.
1090s First troubadours (Occitania).
890s De facto independence of the Catalan Counties; Musica enchiriadis (beginnings of western polyphonic music); The Cadaver Synod.
-90s Antikythera mechanism ("estimated to have been made around 100 BC").
-190s Parchment is invented (in theory).
-290s The construction of the Colossus of Rhodes begins (292 BC).
-590s Solon's democratic reforms.
-1690s Minoan frescoes.
-1890s First Minoan palaces.