[School year 2023] Date of birth and age of 1st year Ph.D. student

Calculate date of birth and age from grade

Date of birth and age of 1st year Ph.D. student as of School year 2023(Reiwa 5).
You can also check the age before and after the birthday, and the Sexagenary cycle.
In addition, you can easily check Grade list such as date of birth, grade, age, etc. for each year in the table.

School year starts on April 1st and ends on March 31st of the following year.
"School year 2023" is from April 1, 2023 to March 31, 2024.

School year 2023(Reiwa 5) - 1st year Ph.D. student

School year 2023
(Reiwa 5)
April 2, 2023 – April 1, 2024
Grade 1st year Ph.D. student
Date of birth April 2, 1998 – April 1, 1999
Age 24 years old – 25 years old
If your birthday has not yet come after April 2nd : 24 years old
If your birthday is after April 2nd : 25 years old
Sexagenary cycle
Born in 1998 : 寅(Tora 寅(Tora))
Born in 1999 : 卯(U 卯(U))

Grade list

DateGrade Age
April 2, 1998 – April 1, 1999 Birth
April 2, 1999 – April 1, 2000 0 – 1
April 2, 2000 – April 1, 2001 1 – 2
April 2, 2001 – April 1, 2002 2 – 3
April 2, 2002 – April 1, 2003 1st year of kindergarten 3 – 4
April 2, 2003 – April 1, 2004 2nd year of kindergarten 4 – 5
April 2, 2004 – April 1, 2005 3rd year of kindergarten 5 – 6
April 2, 2005 – April 1, 2006 1st grade in elementary school 6 – 7
April 2, 2006 – April 1, 2007 2nd grade in elementary school 7 – 8
April 2, 2007 – April 1, 2008 3rd grade in elementary school 8 – 9
April 2, 2008 – April 1, 2009 4th grade in elementary school 9 – 10
April 2, 2009 – April 1, 2010 5th grade in elementary school 10 – 11
April 2, 2010 – April 1, 2011 6th grade in elementary school 11 – 12
April 2, 2011 – April 1, 2012 1st grade in junior high school 12 – 13
April 2, 2012 – April 1, 2013 2nd grade in junior high school 13 – 14
April 2, 2013 – April 1, 2014 3rd grade in junior high school 14 – 15
April 2, 2014 – April 1, 2015 1st grade in high school 15 – 16
April 2, 2015 – April 1, 2016 2nd grade in high school 16 – 17
April 2, 2016 – April 1, 2017 3rd grade in high school 17 – 18
April 2, 2017 – April 1, 2018 1st year university student 18 – 19
April 2, 2018 – April 1, 2019 2nd year university student 19 – 20
April 2, 2019 – April 1, 2020 3rd year university student 20 – 21
April 2, 2020 – April 1, 2021 4th year university student 21 – 22
April 2, 2021 – April 1, 2022 1st year master's student 22 – 23
April 2, 2022 – April 1, 2023 2nd year master's student 23 – 24
April 2, 2023 – April 1, 2024 1st year Ph.D. student 24 – 25
April 2, 2024 – April 1, 2025 2nd year Ph.D. student 25 – 26
April 2, 2025 – April 1, 2026 3rd year Ph.D. student 26 – 27

*Primary school(6 years) / Junior high school(3 years) / High school(3 years) / Four-year university(4 years) / Master's course(2 years) / Doctoral course(3 years)

*Age does not take into account repeat grades or ronin.

Other years