Birthday

Birthdays occur when Sims go to their next stage of life. Whenever a Sim is two days away from the next age transition, a warning will pop up in the top right corner alerting the player that there are only two days to either get the Sim's aspiration score up (if the Sim is in the negative), or that there is nothing to worry about since the Sim's aspiration is already high.
Twenty-four hours after that warning, the player will get another alert stating that the Sim can age. Sims can age up using a birthday cake, which can be purchased in buy mode, purchased from a supermarket, baked at home, or purchased in a restaurant. In The Sims 2, the player can also instruct a Sim (as long as they are not babiesThe grow up self interaction can be used for a baby if it is made selectable with a cheat) to "Grow Up" on their own without a birthday cake. In order for a baby to grow up, a Sim (teen or older) must take the baby to a cake or wait until they (autonomously) get the interaction to "Help Grow Up" eventually.
Sims can choose to throw a party to commemorate their birthday. Birthday parties normally can only be thrown on the day the Sim ages up, although birthday parties can be thrown at any time in The Sims 3. In The Sims 4, Sims who don't blow out their candles, or who fail to throw a birthday party in time, will receive a sad "Forgotten Birthday" moodlet.
Sims grow up well or grow up badly depending on their aspiration score at the time of transitioning, how well they did in school or learned toddler skills. A Sim growing up well will have player chosen traits, while a Sim growing up badly will develop a negative trait.
==Progression==
Sims progress from birth, through infancy and on to old age and, eventually, death. The following chart shows which life states are available in each game. Unless otherwise noted, Sims progress through each life stage in order from left to right.
Game 	Baby	Infant	Toddler	Child	Teen	Young Adult	Adult	Elder	Notes
The Sims 	Yes 	No 	No 	Yes 	No 	No 	Yes 	No 	Children do not grow up into adults, and adults do not die of old age
The Sims 2 	Yes 	No 	Yes 	Yes 	Yes 	No 	Yes 	Yes 	
The Sims 2: University	Yes 	No 	Yes 	Yes 	Yes 	Optional 	Yes 	Yes 	Teens can go to college and become young adults, or skip college and go directly from teen to adult
The Sims 3 	Yes 	No 	Yes 	Yes 	Yes 	Yes 	Yes 	Yes 	
The Sims 4 	Yes 	Yes 	Yes 	Yes 	Yes 	Yes 	Yes 	Yes 	Toddlers were added in a patch released January 12, 2017. Infants were added in a patch released on March 14, 2023.
==Related moodlets ==
===The Sims 3===
Moodlet	Name 	Mood Effect	Time Period	From 	Game Dialog/Description 	Notes
 	Celebrated Birthday	+40 	24 Hours 	Celebrating Birthday	Birthday parties are the best!	Throw a birthday party and blow out the candles. When blowing out candles, a fire may start.
===The Sims 4===
Moodlet	Name 	Effect	Emotion	Time Period	From 	Game Dialog/Description 	Notes 	EP
 	Birthday! 	1 	Happy 	4 Hours 	Birthday Party 	Birthdays are fun! Heck, any party is a good time. But a celebration with a personal cake? Woo! 	This moodlet mostly appears when a teen or older Sim is celebrating their birthday. It also appears if a Sim is celebrating the birthday of another Sim or if a Sim is celebrating their birthday without throwing a party.	
 	Birthday Joy 	2 	Happy 	4 Hours 	Birthday Party 	Nothing helps take away the pain of getting older like having a good party. 	Child Sims or younger mostly get this moodlet when celebrating their birthday. 	
 	Forgotten Birthday	1 	Sad 	12 Hours 	Forgotten Birthday	(Sim Name) forgot to have a party for his birthday. Or maybe no one wanted to come? Either way, it's very sad.	Allow the Sim to age up automatically instead of using the birthday cake. The "From" label will also be "Forgotten Birthday". 	
==Player tips==
*Sims will age at 18:00 (6 PM) in The Sims 2. A Sim's age will advance at 00:00 (12 AM) in The Sims 3, but Sims will not advance to the next life stage at any particular time.
*Using a birthday cake brings everyone on the lot to watch and blow noise-makers.
*A Sim can throw a birthday party but it is not required to age.
*If left alone, on the last day of the Sim's age period, they will age on their own. In The Sims 3, Sims wake up, use a toy and turn it, replacing the birthday cake and age up. It will bring everyone on the lot to watch and blow noise-makers.
*In The Sims, babies will eventually grow up into children, but children will never grow up into adults. The only way to age a child into an adult is by using the Age of Instant charm (needs Toadstools and 2x Dragon Scales) in The Sims: Makin' Magic.
* It is possible to have a birthday in The Sims by buying a birthday cake and throwing a party; however, the Sim blowing out the candles will not age up from doing so.
*Always buy cake for babies because of the time restrictions on when a Sim ages. Sims may be constantly interrupted by the autonomous interaction but never succeed in aging the baby.
*Wait until a Sim's mood is not in the red zone before aging them.
* A birthday cake will grow the Sim to the next life stage regardless of how many days remain.
*Using the testingcheatsenabled true, players can age up Sims by shift-clicking one and choose the "Trigger Age Transition." That way, players can make them die from old age instantly as well.
*Throwing a birthday party and blowing out candles on the cake will give positive moodlets.
==Notes==
Category:Life stages
Category:Game mechanics