Limited Time Events are events only held for a certain length of time. There are a variety of limited time events in the game including building sales, Mayor's Gift Games, Mayor's Pass Seasons, and also events that modify some element of the game.
Limited Time Sale Events[]
Building Menu Sales[]
In Building Menu Sales, limited time buildings are offered for sale in the listings of one or more specializations for Golden Keys, Platinum Keys, SimCash or Simoleons. The buildings available usually follow a theme.
Advertised Offers[]
Advertised Offers are pop-ups featured in the game for a single building or a building bundled with other items such as Golden Keys, Platinum Keys and/or Expansion/Storage Items. The offers tend to require the player to use SimCash or real money. The offers last at least 24 hours.
Limited Time Prize Events[]
Contest of Mayors Seasons[]
Contest of Mayors Seasons is the predecessor to the Mayor's Pass. It started in October 2016 and ended in 2019. It required players to participate in the Contest of Mayors in order to progress from league to league to win limited time buildings. Each individual season was available for weeks. The Contest of Mayors Seasons lasted 15 seasons.
Mayor's Gift Games[]
Mayor's Gift Games are games of chance in which players could earn campaign currency for the chance to win limited time buildings as a reward. They would usually follow some type of theme. From my research, they seem to have occurred from late 2017 thru 2019.
Mayor's Pass[]
Mayor's Pass started in June 2019. Every season has lasted for 6 weeks except the first 2 seasons. It consists of a tiered track that contains limited time buildings and other prizes. Just like the Contest of Mayors Seasons, the player progresses from tier to tier of the track by playing the Contest of Mayors.
Event Tracks[]
Event Tracks are themed events that tend to last 7 days. The player has to earn pink plumbobs (or Event Points) to progress along the event track that usually contains a variety of prizes including new and returning limited time buildings. The player can usually earn event points by either upgrading housing zones, completing tasks in Contests of Mayors or making a purchase.
Vu Pass[]
Vu Pass is a reward track that players can progress along by earning war points from using war disasters. There are 3 levels of Vu Passes that get increasingly harder. The Vu Pass lasts for 14 days at which point it resets.
The Blueprint Exchange[]
The Blueprint Exchange is basically the prize store within Design Challenges. A player earns blueprints by submitting city designs. They, in turn, can then use the blueprints to purchased prizes including limited time buildings, Keys, Special Items, Simoleons, SimCash and War Simoleons. For a full Design Challenge season, the Blueprint Exchange lasts 28 days. For a Design Dash, it lasts 7 days.
Limited Time Game-play Events[]
Epic Project Events[]
Epic events are related to building epic buildings faster.
Epic Week or Weekend/Epic Madness[]
During this event, Epic points are doubled for one or more specializations.
Triple Hot Spot Weekend[]
During this event, all Hot Spot buildings give three times the usual amount of Epic Points.
Contest of Mayors Events[]
Double Plumbobs Event[]
During this event, the amount of plumbobs (or points) awarded for each Contest of Mayors task is doubled.
Lightning CoM Week[]
During this event, CoM is shorten from a week-long event to 2 to 3 mini events that lasts between 48 to 72 hours. Final prizes are also less during a Lightning CoM Week versus the week-long event.
Milestone Assignment Event[]
During the Milestone Assignment Event, players can progress against more milestone assignments at the same time.
Club War Events[]
Lightning War Events[]
Lightning War Events last 1 week and change the length a Club War takes. The Preparation Phase lasts 6 hours instead of 12, the Attack Phase lasts 24 hours instead of 36, and Cooldown is 1 minute instead of 12 hours.
Half-Energy Disaster Events[]
Half-Energy Disaster Events last 1 week and make a specific disaster require half the amount of Vu Energy to launch.
V.U.S.P. Events[]
V.U.S.P. Events last 1 week. When attacking a V.U.S.P, players will receive double the amount of War Points.
OMEGA Events[]
Future Cities Event[]
During this event, the Omega Research Center and Neo Mall timers are 50% faster; NeoSimoleon and SimCash prices for OMEGA items in the NeoMall are reduced.
Cargo Ship Dock Events[]
Double Keys Weekend![]
During this event, completing cargo shipments from the Cargo Ship Dock will earn you twice the amount of Golden Keys.
Farm Deliveries[]
Farm Deliveries is a destination in the Cargo Ship Dock that was introduced June 2022. Farm Deliveries were only available during an Event Track. They worked similar to Cargo Ship Orders. Once an order is complete, 40 Event Points will be rewarded to the current Event Track.
Special Deliveries[]
Special Deliveries is a destination in the Cargo Ship Dock that appeared in 2023. It works the same as Cargo Ship Orders. Once an order is complete, you're rewarded with a Special Item.
Airport Events[]
Faster Airport Shipments[]
During this event, the delivery time at the specified Airport are 50% shorter, so you can earn building materials faster.
Train Events[]
Train Dispatch Event[]
During this event, all train cooldowns are reduced by half.