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Baby D-Day & School Entry Calculator

Enter your baby's birthday to calculate 100-day and 1st birthday dates school entry years and Korean age all at once.

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Enter the date of birth to generate the full timeline.

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What is the Baby Timeline Calculator?

A calculator that takes your baby's birth date and instantly computes key milestone dates including the 100-day celebration, first birthday, elementary school entry year, and both international and Korean civil age. It reflects Korea's age calculation system and school calendar so you can see the full timeline from school entry to graduation.

연도별 학교 입학 · 졸업 연도표

💡초등학교 입학은 만 6세가 된 이듬해 3월 기준입니다. (출생연도 + 7)

출생초등학교중학교고등학교대학
입학졸업입학졸업입학졸업
2035년생 35년42484851515454
2034년생 34년41474750505353
2033년생 33년40464649495252
2032년생 32년39454548485151
2031년생 31년38444447475050
2030년생 30년37434346464949
2029년생 29년36424245454848
2028년생 28년35414144444747
2027년생 27년34404043434646
2026년생 26년33393942424545
2025년생 25년32383841414444
2024년생 24년31373740404343
2023년생 23년30363639394242
2022년생 22년29353538384141
2021년생 21년28343437374040
2020년생 20년27333336363939
2019년생 19년26323235353838
2018년생 18년25313134343737
2017년생 17년24303033333636
2016년생 16년23292932323535
2015년생 15년22282831313434
2014년생 14년21272730303333
2013년생 13년20262629293232
2012년생 12년19252528283131
2011년생 11년18242427273030
2010년생 10년17232326262929
2009년생 09년16222225252828
2008년생 08년15212124242727
2007년생 07년14202023232626
2006년생 06년13191922222525
2005년생 05년12181821212424
2004년생 04년11171720202323
2003년생 03년10161619192222
2002년생 02년09151518182121
2001년생 01년08141417172020
2000년생 00년07131316161919
1999년생 99년06121215151818
1998년생 98년05111114141717
1997년생 97년04101013131616
1996년생 96년03090912121515
1995년생 95년02080811111414
1994년생 94년01070710101313
1993년생 93년00060609091212
1992년생 92년99050508081111
1991년생 91년98040407071010
1990년생 90년97030306060909

한국 만 6세 기준 / 3월 1일 입학 / 1~2월생 조기입학 제도 사실상 폐지

How Elementary School Entry Year Is Calculated in Korea

Elementary school entry year = birth year + 7 (March 1st entry each year)

All children born between January 1st and December 31st of the same year enter the same grade. The early admission system has been effectively abolished so January and February babies enter with their same-year peers.

Difference Between International Age and Korean Civil Age

International age is calculated based on your birthday and is the global standard. Since 2023 Korea's official age system has been unified to international age.

Korean civil age is the current year minus the birth year. Some laws such as the Youth Protection Act still apply this age. For example the legal age for purchasing alcohol and tobacco starts from January 1st of the year you turn 19 in civil age.

Recommended For

  • New parents: When calculating 100-day and first birthday celebration dates in advance
  • School prep: When checking your child's elementary school entry year
  • Age check: When you need to distinguish between international age and Korean civil age
  • Official documents: When you need your child's exact international age for paperwork
  • Long-term planning: When viewing the full academic timeline through graduation at a glance

Frequently Asked Questions

No. The early admission system in Korea has been effectively abolished and all children born in the same year enter the same grade. Parents can still apply for early admission but this is very rare.

Since June 2023 international age has been Korea's official standard. However some laws like the Youth Protection Act still use Korean civil age.

Under Korean civil law a person becomes a legal adult on their 19th birthday by international age. From that point legal acts are possible without parental consent. However the legal age for alcohol and tobacco purchases starts January 1st of the year you turn 19 in civil age, which differs slightly.

The 100-day celebration falls on exactly the 100th day from birth, and the first birthday is exactly one year from the birth date. Both are calculated by the solar calendar, not the lunar calendar.

Elementary school entrance ceremonies in Korea are held around March 2nd each year. The school year officially starts on March 1st and the exact ceremony date may vary by school.