Age Across Cultures
Find age in years, months, days.
Age · Blog
Articles about Age
Exact years, days alive, days to next birthday — with Western and Chinese zodiac.
In English-speaking markets the math is simpler — there's only one age — but the curiosity is broader. Days alive (10,000-day milestones), Western and Chinese zodiac, retirement age (Social Security FRA 67 for those born after 1960), school-year cutoffs by US state. We've collected guides that go past the simple "I'm 32" answer to the things people actually search for around birthdays and life milestones.
What this category covers
- 10,000 days alive — milestone math
- Social Security full retirement age — 67 vs 70 election
- Chinese zodiac — Year of birth and personality lore
- School year cutoffs — by US state
Primary sources
- Social Security Administration — FRA tables
- US Census Bureau — age and milestone data
- CDC — life expectancy by birth year
Want to use the tool directly? Head to Age. The articles below are sorted newest first.
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Turning 30, Turning 40 — Korea's Two Adult Milestones (2026)
Korea's youth policy ends at 34, national cancer screening starts at 40. The five checkpoints to run, and how Korea's 30s and 40s compare to the US.
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Lunar vs Solar Birthdays in Korea (2026)
Why Korean parents over 60 still celebrate Hwangap by the moon, why Lunar New Year babies get a different solar date each year, and how leap-month babies handle birthdays.
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Turning 65 in Korea: Free Subway, Pension, Palaces vs US Medicare
Korea's 65th birthday triggers free city subway, basic pension, free royal palaces, and KTX 30% off — all from day one. Compared with US Medicare and Japan's tiered system.
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Saju — Korea's Four Pillars of Destiny, Down to the Hour You Were Born
Saju adds birth time to year, month, and day for four pillars — eight characters total. How 12 traditional 2-hour slots and the 60-year cycle work, plus how saju compares to Western zodiac.
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1990s in 2026: 1990, 1995, 2000 babies
Born in 1990, 1995, or 2000? US ages, school cohort, generation, average marriage age, and Social Security horizon — the 1990s decade in one chart.
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US Milestone Ages: 16, 18, 21, 25, 40, 50, 65 — One Lifetime Timeline
Driving at 16, voting at 18, drinking at 21, no rental-car surcharge at 25, ADEA at 40, catch-up contributions at 50, Medicare at 65. Every threshold the American legal year hands you, in one chart.
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Coming-of-Age in the U.S.: 16, 18, 21 — Why No Single Adulthood Day
16 to drive, 18 to vote, 21 to drink. The U.S. distributes adulthood across five years instead of one celebration. How this differs from Korean Coming of Age Day and Japanese seijin-shiki.
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Yakudoshi 2026 — Japan's Unlucky Years for Men 42 and Women 33
Yakudoshi (厄年) is Japan's traditional system of unlucky years. Men face 25, 42, 61; women face 19, 33, 37, 61. Each comes as a three-year set with pre-, main-, and post-yaku.
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Birthstones, Western Zodiac, and Chinese Zodiac: Three Cards from One Birthday
January Garnet to December Turquoise, 12 zodiac signs, 12 Chinese animals. The three cultural systems that name your birthday — and where they overlap or diverge.
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What Is Reiwa Year 8? Converting Japanese Eras to Western Years (2026)
Reiwa 8 = 2026, Heisei 31 = 2019, Showa 63 = 1988. The conversion formulas, era boundaries, and why one Japanese birthday in early 1989 spans two different eras.
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Social Security Ages: 62, 67, 70 — and the Real Cost of Claiming Early
Full retirement age is 67 if you were born after 1960. Claim at 62 and lock in roughly a 30% cut for life. Wait until 70 and your benefit grows by 8% per year of delay.
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East Asian Longevity Milestones: A Guest's Guide to 60, 70, 88 and 99
Korea, Japan, and China share an eight-step longevity tradition turning 60, 70, 77, 80, 88, 90, 99, and 100 into named celebrations. What each means, what color to wear, what to bring.
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Baby Milestones in Year One: From 100 Days to First Birthday
Korean baengil at 100 days, Japanese okuizome at 100 days, American first birthday at 1 year — three cultures mark the same arc differently. A practical guide for international families.
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The Korean Man's Duty Calendar
Why K-pop idols enlist at 28, why every Korean man stays on standby until 40, and how the Korean conscription clock actually works year by year.
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Kindergarten Cutoff Dates: Why Your State's Date Matters More Than You Think
U.S. kindergarten cutoffs range from June 1 to October 16 across the 50 states. The same August birthday makes your child the youngest in CA but the oldest in MO. Redshirting strategy explained.
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Are 1990s kids Millennials or Gen Z? The 1996/1997 Pew Cutoff
Pew Research drew the line at 1996/1997. A December 1996 birthday makes you the last Millennial; January 1997 makes you the oldest Gen Z. Why one year matters more than your school yearbook.
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Korean Age System: Why Your Bias Has Three Different Ages
International, Korean, and year age — the three numbers a single person carries in Korea. How June 2023's unification law actually worked, and which age applies where.
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18 to Vote, 21 to Drink: How Legal Ages Split a Single Year
In the US an 18-year-old can vote, sign leases, and enlist — but can't buy a beer for three more years. Here is the legal age ladder, country by country.
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10,000 Days Alive: The Metric Birthday in Your Late 20s
Day 10,000 lands at 27 years and 4 months — the Saturn Return window. The full metric birthday ladder, plus when wedding anniversaries go metric.
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What Generation Am I? Every Face of Age in 2026
Find your generation (Boomer to Gen Beta), birthstone, Western zodiac with element, days alive milestone, plus Korean and Japanese age — all from one date.