Baby D-Day & School Entry Calculator

Enter your baby's birthday online to calculate the 100-day and 1st birthday dates, school entry years from elementary through university, and age in both international and civil counting systems — all at once.

Enter Date

Enter the date of birth to generate the full timeline.

Did we solve your problem?

What is the Baby Timeline Calculator?

A browser-based baby milestone calculator for tracking key dates online. Enter your baby's birth date to instantly see the 100-day and first birthday dates, school entry years from elementary through university, and age under both international and civil age-counting systems. Reflects the school calendar and age rules used in Korea so you can plan the full timeline from infancy to graduation.

School Entry & Graduation Year Table

💡Elementary school entry is the March after turning age 6. (Birth year + 7)

Birth	Elementary		Middle		High School		University
Birth	Entry	Grad.	Entry	Grad.	Entry	Grad.	University
Born 2035 35	42	48	48	51	51	54	54
Born 2034 34	41	47	47	50	50	53	53
Born 2033 33	40	46	46	49	49	52	52
Born 2032 32	39	45	45	48	48	51	51
Born 2031 31	38	44	44	47	47	50	50
Born 2030 30	37	43	43	46	46	49	49
Born 2029 29	36	42	42	45	45	48	48
Born 2028 28	35	41	41	44	44	47	47
Born 2027 27	34	40	40	43	43	46	46
Born 2026 26	33	39	39	42	42	45	45
Born 2025 25	32	38	38	41	41	44	44
Born 2024 24	31	37	37	40	40	43	43
Born 2023 23	30	36	36	39	39	42	42
Born 2022 22	29	35	35	38	38	41	41
Born 2021 21	28	34	34	37	37	40	40
Born 2020 20	27	33	33	36	36	39	39
Born 2019 19	26	32	32	35	35	38	38
Born 2018 18	25	31	31	34	34	37	37
Born 2017 17	24	30	30	33	33	36	36
Born 2016 16	23	29	29	32	32	35	35
Born 2015 15	22	28	28	31	31	34	34
Born 2014 14	21	27	27	30	30	33	33
Born 2013 13	20	26	26	29	29	32	32
Born 2012 12	19	25	25	28	28	31	31
Born 2011 11	18	24	24	27	27	30	30
Born 2010 10	17	23	23	26	26	29	29
Born 2009 09	16	22	22	25	25	28	28
Born 2008 08	15	21	21	24	24	27	27
Born 2007 07	14	20	20	23	23	26	26
Born 2006 06	13	19	19	22	22	25	25
Born 2005 05	12	18	18	21	21	24	24
Born 2004 04	11	17	17	20	20	23	23
Born 2003 03	10	16	16	19	19	22	22
Born 2002 02	09	15	15	18	18	21	21
Born 2001 01	08	14	14	17	17	20	20
Born 2000 00	07	13	13	16	16	19	19
Born 1999 99	06	12	12	15	15	18	18
Born 1998 98	05	11	11	14	14	17	17
Born 1997 97	04	10	10	13	13	16	16
Born 1996 96	03	09	09	12	12	15	15
Born 1995 95	02	08	08	11	11	14	14
Born 1994 94	01	07	07	10	10	13	13
Born 1993 93	00	06	06	09	09	12	12
Born 1992 92	99	05	05	08	08	11	11
Born 1991 91	98	04	04	07	07	10	10
Born 1990 90	97	03	03	06	06	09	09

Korean standard: age 6 / March 1 entry / Early admission for Jan–Feb births effectively abolished

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.

Baby D-Day & School Entry Calculator

Enter Date

What is the Baby Timeline Calculator?

School Entry & Graduation Year Table

How Elementary School Entry Year Is Calculated in Korea

Difference Between International Age and Korean Civil Age

Recommended For

Frequently Asked Questions

1.Do January or February babies start school earlier in Korea?

2.Which is official: international age or Korean civil age?

3.When does a person become a legal adult in Korea?

4.How exactly are the 100-day and first birthday celebrations calculated?

5.What is the exact school entry date?

Enter Date

Frequently Asked Questions

1.Do January or February babies start school earlier in Korea?

2.Which is official: international age or Korean civil age?

3.When does a person become a legal adult in Korea?

4.How exactly are the 100-day and first birthday celebrations calculated?

5.What is the exact school entry date?