Collective Birthday Calendar

Our Birthday

PC version. Mobil friendly version.

Refer our website

E-mail address where you want to send this:

I agree to the Privacy Policy .

The main idea of the Collective Birthday Calendar is to calculate the common birthdate of many people together. The program is able to calculate the average birthday of 2-30 people collectively, up to the 2000th birthday.

Let me quote the ancient philosopher, Democritus: „Life without celebrations is a long journey without rest.

I can highly recommend this new "Collective Birthday Calendar and I wish you good luck and many happy "collective" birthdays!

July 4, 2012, Budapest, Hungary

Jozsef Antal Biro
P. S. This website was published on April 7, 2010 in Hungary.
Free online stopwatch game. Try it now!
Contact -
Number of visitors: 125437 © all rights reserved
↑To the top ↑