Birthday Calculator

Use this calculator to calculate your birthday and the days remaining.

Select Your Date Of Birth

date of birthday

Date with known age

Age at that date

Created by Helen Stark
Helen Stark
Helen Stark

Student of Harvard university, she loves to observe new things about society, she studies Wikipedia more and learns about quantum physics on the internet. She loves dancing and singing songs.

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Reviewed by Nick Walker
Nick Walker
Nick Walker

Done PHD of nuclear physics from the University of Pennsylvania. He is always seeking ways to explain science in easy terms. Moreover, he loves coffee & its beans more than his girlfriend (not at all).

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Our birthday calculator helps to calculate:

  • Upcoming birthday and days left
  • Exact date of birth (DOB)
  • Birthdays you have celebrated till now with corresponding weekdays

Plus, it also gives you the days until the upcoming half birthday.

How to Use Birthday Calculator?

  1. Enter your date of birth
  2. Click ‘Calculate
  3. Get your upcoming birthday, remaining days, and more

How Do I Calculate My Birthday Using My DO?

Birthday can be calculated by either of the following methods:

Method 1:

  • Identify the current date
  • Determine the exact month and day of your birthday
  • If the current date and month have passed, add 1 year to the birth year
  • If the current date and month have not passed, then the upcoming birthday will be in the same year

For example:

If your date of birth is April 20, 1999, and your current date is April 18, 2024:

  • Current Date: April 18, 2024
  • DOB: April 20, 1999

As April 20 has not passed, so the upcoming birthday will be on April 20, 2024.

Method 2:

  • Enter your DOB in the birthday calculator and determine the next birthday and weekdays concerned with it.

People Also Ask:

What Is My Date of Birth If I'm 21 Today?

Add your current age (21) and today's date using the birthday calculator to know your date of birth.

How To Calculate Date of Birth of a Deceased Person?

You can estimate the date of birth of a deceased person if you know his/her age in years, months, and days. The process involves three subtractions, such as:

  • Subtract days in age from days in the death date
  • Subtract the number of months between two dates
  • Subtract years between two dates

Which Generation Am I?

Generation Years
The WWII Generation 1901 to 1927
The Post War Generation 1928 to 1945
The Boomer Generation 1946 to 1964
Generation X 1965 to 1980
Millennials 1981 to 1996
Generation Z 1997 to 2012
Generation Alpha 2013 to 2024

Reference Studies:

Wikipedia: Birthday, Legal conventions, Cultural conventions, Traditions, Distribution through the year

Redlich, O. (2020). The Concept of Birthday: A Theoretical, Historical, and Social Overview, in Judaism and Other Cultures.