Being a "kid" is subjective, but legally it often ends at 18 (age of majority), while developmentally, childhood spans infancy through adolescence (around 12-20), with many considering teens and even young adults (early 20s) still "kids" due to brain development and maturity levels, making it a blend of legal status, cultural perception, and personal perspective.
Some inclusive definitions extend the range into the early to mid 40s, while others end earlier. The young adult phase is typically defined as lasting from around the age of 18 to 25. The brain also finishes its development during this period, transitioning into full adulthood.
Legally speaking, most countries classify 18 years old as an adult; but practically, if you live you're still dependent on a guardian or parent/s, without contributing to the household expenditures and livelihood, then you're just a child living in an adult's body.
Technically you are a child from birth until puberty. Once you hit puberty, you are no longer a child. At puberty you enter a phase called adolescence, which is commonly referred to as being a teenager. You become an adult somewhere between 18 and 21 depending on who you talk to.
The 20-40 age group is broadly called Young Adults, encompassing the "20-somethings" (vicenarians) and "30-somethings" (tricenarians), often aligning with the Millennial generation, though specific labels vary by context (e.g., social science, marketing, or demographic research).
In the United States, a minor is any individual under the specified “age of majority” for their state or territory., All states define an age of majority, which is usually set at 18, but states like Indiana and Mississippi set it at 21, while in Alabama, Colorado, Maryland, or Nebraska, the age of majority is 19.
Any period of ten years is a 'decade' or 'decennium'.
A teenager's age is typically from 13 to 19 years old, a period known as adolescence, marked by significant physical, emotional, and social changes as individuals transition from childhood to adulthood, with development continuing into the early twenties.
Generation Z (Gen Z) refers to the generation born from 1997 to 2012. Gen Z is bracketed between Millennials (born from 1981 to 1996) and Generation Alpha. The oldest members of Gen Z are starting their post-education years with careers and possibly families.
Adolescence is an important time for brain development.
The brain finishes developing and maturing in the mid-to-late 20s.
Adolescence is the phase of life between childhood and adulthood, from ages 10 to 19. It is a unique stage of human development and an important time for laying the foundations of good health. Adolescents experience rapid physical, cognitive and psychosocial growth.
Eighteen is too young to label someone An adult. We usually think people at this age suddenly become so mature. Now they are mature enough to make decisions for themselves in their Career, Character development, Getting a job, College life, Relationships and to be able to do literally everything.
For women this occurs, on average, by 18-20 years and for men the typical ages are 20-23 years. The Prime adult years continue until about age 30-35 years in both sexes. These years are notable for their stability and predictability in physical and cognitive performance, also called homeostasis by biologists.
Most countries set the age of majority at 18, but some jurisdictions have a higher age and others lower. The word majority here refers to having greater years and being of full age as opposed to minority, the state of being a minor.
The "3-3-3 Rule" for kids is a simple mindfulness technique to manage anxiety by grounding them in the present moment: first, name three things they can see; next, identify three sounds they hear; and finally, move three different parts of their body. This engages their senses, shifts focus from worries, and helps them regain control when feeling overwhelmed, like during test anxiety or social situations.
Late Adolescence (Ages 18-21)
Teens in this stage often begin to re-establish a more mature relationship with caregivers, frequently seeking advice more from their parents. They become more comfortable with their personal values and beliefs, which may even differ from those of their friends.
Whilst boomers and millennials may use the 😂 emoji, this has long since been deemed 'uncool' (or 'cheugy') by Gen Z. Instead, this has been replaced by the skull (💀) or the crying emoji (😭), dramatising the idea of 'dying with laughter'.
While other cohorts (e.g., Baby Boomers, Generation X, Millennials, Generation Z) are defined by age brackets, Gen C is defined by its members' digital-first lifestyle and mindset. So whether someone is 10 or 82 years old, they can still be a part of Gen C.
Donald Trump, born in June 1946, falls squarely into the Baby Boomer generation (typically 1946-1964) as one of the first individuals in that cohort, while President Joe Biden, born in 1942, is a member of the preceding Silent Generation (roughly 1928-1946). Trump's birth year places him at the very beginning of the Baby Boom era, making him a Boomer, not Silent Generation.
Some age-related development periods with defined intervals include: newborn (ages 0–2 months); infant (ages 3–11 months); toddler (ages 1–2 years); preschooler (ages 3–4 years); prime childhood (ages 5–8 years); preteens (ages 9-12 years); and teens (ages 13–19 years).
Parents and their tweens and teens together should discuss maturity and readiness, safety, and family values regarding relationships. To Date or Not to Date: There's no perfect age to start dating but some pediatricians recommend to wait until 16, says WebMD, which may vary according to one's community norms.
Most teens need about 8 to 10 hours of sleep each night. Getting the right amount of sleep is important for anyone who wants to do well on a test or play their best in sports. Unfortunately, many teens don't get enough sleep.
The metric prefix giga indicates 1,000,000,000 times the base unit. Its symbol is G. One billion years may be called an eon in astronomy or geology.
To solve this problem, we have to remember that a century is 100 years, therefore 4 centuries are 4×100=400 years.
75 years is often called a Diamond Jubilee, especially for significant institutional or royal anniversaries, though it can also be seen as a Platinum Anniversary in some traditions, with the 60th often being the Diamond and the 70th the Platinum; for personal occasions like weddings, it's a rare and significant Diamond anniversary, sometimes called an Atomic Anniversary in modern lists, symbolizing extreme longevity.