Adulthood

This is where you get to vote, smoke, drink, play the lottery, enter a casino, etc., The age was 18, but on January 1st, 2030, it was raised from 18 to 21, and the traditional college age range would be raised from 18-22 to 21-25 and 18-20 year olds would be considered minors and high schools would add "13th grade" for ages 18-19, "14th grade" for ages 19-20 and "15th grade" for ages 20-21. The extra grade levels will include a curriculum similar to a liberal arts degree in college and will include more essential 21st century skills such as critical thinking, communication, environmental awareness, diversity, technology skills, etc. These skills will be important for entering a more globalized, increasingly diverse workplace and with dealing with the complex adult world. 
Plans were originally to raise the age of adulthood in 1999 and to take effect on January 1st, 2000, but that never happened, then made a second attempt to take effect on January 1st, 2010 but that never happened either. A similar attempt take place in 2020 but never happened either.
Worldwide ages for Adulthood as of 2030 (they all range between ages 15-21)
15 - Middle East (14 and younger are still minors)
Age 3-5 - Preschool or Pre-kindergarten
Age 6-11 - Primary school
Age 12-14 - Secondary school 
16 - UK, Scotland, Germany, Belgium, The Netherlands, Brazil and The Carribean (15 and younger are still minors)
UK and Scotland 
Age 3-4 - Pre-kindergarten 
Age 5-11 - Primary school
Age 12-15 - Secondary school
Germany 
Age 2-5 - Kindergarten 
Age 6-11 - Primary school
Age 12-13 - Gymnasium 
Age 14-15 - Fachoberschule
Belgium 
Age 2-5 - Pre-school
Age 6-11 - Primary school
Age 12-15 - Secondary school
The Netherlands 
Age 4-11 - Elementary school
Age 12-15 - High school
Brazil
Age 2-5 - Pre-school
Age 6-13 - Elementary school
Age 14-15 - High school
The Carribean 
Age 3-5 - early childhood education 
Age 6-11 - Primary school 
Age 12-15 - High school
17 - Indonesia, North Korea and Ireland (16 and younger are still minors)
Ireland
Age 3-5 - Pre-school or Pre-kindergarten 
Age 6-11 - Primary school
Age 12-16 - Secondary school
North Korea
Age 4-5 - Kindergarten
Age 6-9 - Primary school
Age 10-16 - Secondary school
Indonesia
Age 2-3 - Taman Bermain 
Age 4-5 - Taman Kanak-Kanak 
Age 6-11 - Sekolah Dasar 
Age 12-16 - Sekolah Menengah Atas 
18 - France, Portugal, Spain, Poland, A few Latin American countries, Quebec (finallly gains independence from Canada), Alberta and Manitoba in Canada, Mexico and Russia (17 and younger are still minors)
You go to school up until you turn 18 
19 - South Korea and Canada (except Alberta and Manitoba, 18 and younger are still minors)
South Korea
Age 4-6 - Kindergarten
Age 7-12 - Primary school
Age 13-15 - Middle school
Age 16-18 - High school 
Canada
Age 5-11 - Elementary school
Age 12-14 - Junior high school 
Age 15-18 - Senior high school
20 - Australia, New Zealand, Thailand, Paraguay, Japan, Taiwan, Finland, Denmark, Iceland, Greenland (finally gains independence from Denmark), Sweden and Norway (19 and younger are still minors)
You go to school until you turn 20
Denmark
Age 6-11 - Primary school
Age 11-15 - Lower secondary school 
Age 15-20 - Upper secondary school 
Sweden
Age 7-15 - Grundskola 
Age 15-20 - Gymnasieskola 
Norway
Age 6-11 - Barneskole 
Age 11-15 - Undomsskole 
Age 15-20 - Videregaenede skole 
Finland
Age 7-15 - Comprehensive school
Age 15-20 - Lukio 
Iceland 
Age 6-15 - Grunnskoli 
Age 15-20 - Framhaldsskoli 
21 - Most of the world (including the US, 20 and younger are still minors)
You go to school until you turn 21
US
Age 5-10 - Elementary school
Age 10-13 - Middle school
Age 13-16 - Junior high school
Age 16-21 - Senior high school
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