EventCalc is a web application that accurately calculates the date of a half birthday along with some potentially interesting numbers like the number of days since the entered date, number of days before the current date and the next half birthday and birthday, etc. It also does the same for anniversaries. It allows people to set up reminders so that they get SMS messages or emails when an important date is approaching and lets them set up a count down (or count up) to or from a date and time.

EventCalc is now in its third incarnation (version 3.6, as this is being written). It was really terrible when it debuted in the summer of 2007. Back then it was just a way to fool around with building web applications and settle some arguments with friends. Many years later it is a relatively slick single-page application that gets users from all over the world looking up thousands of birthdays and other dates every day. Who would have thought?

After many years of making a modest amount of money hosting advertising, in 2020 we evaluated how much money we were bringing in vs. the actual cost to our users. It was invasive, the provider was tracking all kinds of things about users, and they wanted more and more control over placement – so much so that they would insert ads where we didn’t want them and we couldn’t control any of it. So we pulled them out. We also pulled out anything that would allow any third parties to do any tracking. We’re “clean” and no longer supporting the sale of our user’s data. As a result, we no longer make any money on EventCalc and we pay the bills for servers and other stuff ourselves. We can’t complain about how the web is monetizing people if we are going to do it ourselves.

If you have questions about EventCalc or would like to contact us about it, please send us an email. And, while you are at it, go to EventCalc, look up your half birthday.

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