This was the first party to not be an expedition in January, since 2009.
Gary's removed mascot scripts indicated that it was originally supposed to take place in the past and future, at the time it was called the Future Fest.
Judging by Gary's mascot script, penguins traveled to the Senonian epoch of the Late Cretaceous, around 72.1 million years ago. Despite this, both Tyrannosaurus and Triceratops are from the much later Maastrichtian epoch of the Late Cretaceous, about 66 million years ago.
It played different music than expected when you logged in on certain occasions.
If you wore a clothing item such as a Propeller cap, a Unicycle, etc., (Special Dances) then danced (hit D on your keyboard), and transformed into a Dinosaur, you would see your penguin as you were a Dinosaur. You then had to move around and hit transform back.
Sometimes when you traveled back to the present and right back to the prehistoric time, you would seem to have more coins than you had before. However, if you tried to buy something, it would say that you did not have enough coins. It would then show a never-ending loading screen, and the only solution was to log off and back on to fix it.
Similar to the Halloween Party 2012, if you danced while transformed into a Dinosaur, your penguin's sprite would also appear dancing. If you used an item with a special dance and then you transformed yourself, the sprite of your penguin performing the action would also appear.
Sometimes when you logged in at the prehistoric time, the EPF Phone would be above the map.
If you went to 2013, opened your EPF Phone and then your map to go back to dinosaur times, your phone would be above the map.
On January 19, if you tried to claim the Waterfall, a message would appear saying it was unavailable, even though it should have been available. This glitch was fixed the next day.
If you clicked your Player Card as a Pteranodon and then clicked a place on the wall while you transformed back into a penguin on ground, your penguin would waddle onto the wall.
If you put on the Tour Guide Hat and held up the sign, then became a dinosaur, the dinosaur would be "holding" the penguin and you could carry it anywhere, as prey.
Sometimes when using another browser, the eggs you collected in the previous browser would be gone.