Operation: Blackout was an Elite Penguin Force event that began on November 15, 2012 and ended on December 6, 2012, even though it was originally planned to end on December 4. Rumors had already started in 2011, for on the Behind the Scenes video of Club Penguin, you would see an employee working on a computer. On the screen in big black bold letters, it said Operation: Blackout. It was confirmed on Herbert's,Polo Field's and Billybob's Twitter accounts.Polo Field also blogged about the team making sounds for November. This was the first time Herbert makes an appearance as a mascot, and it was confirmed by Polo Field on his Twitter account.
All the captured agents are freed. When the agents turned off the Solar Laser, its self-destruction was activated. Penguins around the island rejoice, and the sun comes back out, while Herbert screams in defeat. The Director congratulates you for freeing Club Penguin from Herbert's dictatorship, and reveals her identity to be... Aunt Arctic! Rookie was also a meetable character for the rest of the event. Afterwards, Herbert started building the Hot Sauce 3000 for his next plot. He used the outer body of the Solar Laser.
For items obtainable from the mission interface, see here.
Herbert was technically a dictator during this event, having taken over the entire island and making undesirable laws. Before this, it was unknown what the government of Club Penguin Island was, if any.
This is the first time Herbert was meetable in-game.
Club Penguin has been working on Operation: Blackout since 2010 and was supposed to be held in 2011 after Operation: Hibernation. It was postponed to 2012.
Herbert's website (clubherbert.com) was updated through the event, and the last thing he said was "YOU HAVEN'T SEEN THE LAST OF ME", hinting his return.
When ClubHerbert.com came out, there was a picture of Gary and Dot, the top two on Herbert's to capture list, taped to the wall and some penguins believed that they were captured. Then a picture of Rookie was added and it was believed that he was also captured. (This rumor proved to be false due to the update of ClubHerbert.com and Rookie appeared in the Club Penguin Times issue #368)
During Operation: Blackout, players were not able to complete the test to become an EPF agent due to the Everyday Phoning Facility being destroyed.
This party set a Club Penguin record, with 1.8 million penguins logged on November 24, 2012, the largest amount of penguins logged in at a specific time. 
Rookie made official appearances during the last few days of Operation: Blackout.
The last capsule at Herbert's Fortress was completely empty, but it was revealed to be for you. Herbert mentions in the newspaper that the crabs must capture you, or his plan would fail. He also says that you are as dangerous as The Director. This turns out to be true, as when you arrive at the HerbertHQ, you are allowed to fill the empty spot.
The tagline for this party is similar to the tagline for the Future Party.
Glitches during the party
There was a glitch when the party first came out where in the Paradise played the Holiday Party music instead of its own music.
You can still play PSA missions by using the link above it will not ban your penguin.
There is a glitch where you can enter the main command room and also a glitch where you can see Terminal 5.
The ClubHerbert.com website was not updated when the other four agents were captured, while when Gary was captured it was updated. This has been fixed.
There has been a glitch when Club Penguin was updated for the snowstorm, everyone got a free Membership. But it only lasted 10 minutes. But it was confirmed that every time the island gets updated, the same thing will happen.
There was a glitch that when you are in the underground HQ, and open the catalog, when you try to buy something it says Would you like to buy undefined for undefined coins? You currently have [your number of coins]. That glitch was fixed.
There was also a glitch that allowed you to access a terminal without getting the next item.
The operation steps couldn't be seen, so they couldn't get the free items and complete them. The glitch was later fixed.
There was a glitch that allowed you to get to the Herbert HQ and, therefore, defeat Herbert early.
Billybob confirming the event.
A clear image of the Operation: Blackout script from the Behind the Scenes Video.
Herbert tricking Gary and asking for help.
Sneak peek from Polo Field.
A sneak peek of Operation: Blackout of what the Town looks like.
Welcome to the Coffee Store. Herbert says penguins drink too much coffee, so from now on, only carrot juice will be served. Feel free to play all games to play here. But do not have fun. Fun is outlawed.
This is the Video Game Room? Herbert says that arcades are silly. And waste precious time that should be spent on concocting evil plans. But if you're gonna to play anyway, Herbert recommends setting a time limit. About 35 seconds should do.
Welcome to the Dock encampment. A care center has been set up for puffles that are lost, cold, or sick from the Blackout. Please help out if you have a moment. Herbert avoids this place, he doesn't like puffles!
This is the Lighthouse Hospital. We're pretty sure Herbert doesn't know that place exists. Anyone who is sick or injured can come here, or if you need a safe place to get warm. Will this blackout never end?
Up there is the Giant Lightbulb. It's actually getting more use these days, now that Herbert stole all the sunlight. It must stay on, to make sure no boats crash here. Soon it, might be the only light left on the island.
Here we have the Snow Town. Pay no attention to the building on fire. That's just the former base of the Elite Penguin Force. It was disguised as an Everyday Phoning Facility. Wait! That spells EPF too! I just got that!
Voila! This is the HQ for the Elite Penguin Failures! They tried to stop Herbert many times, but Herbert was WAY too smart and strong and talented, and cool and strong, and now they're gone. MWA HA HA!
Welcome to Herbert's Cabin. Herbert originally wanted to cut it down to provided much needed campfires for everyone. But ever since he took over the island, he's decided to keep as it is. Isn't Herbert a nice guy?
This is the Plaza. Here you'll find the best pizzeria on the island, a wonderful Stage production, starring Herbert, and a stinky place full of puffles. Herbert recommends avoiding the Pet Shop, because puffles are really annoying.
Here we have the Pizzeria! Herbert recommends the seaweed vegetarian pizza. In fact when Herbert gets the chance, he'll be outlawing all other kinds of pizzas. So enjoy the Fish Dish pizza while you can.
This is the Dark Cave. The light generator was designed by Herbert, who donated it but never got credit. But that's okay. Herbert is chill about it, especially now that he's Illustrious Leader Supreme. Yay Herbert.