Birthday Tracker: Date Difference Calculator

By default, the start date will be today's date. Enter your birth date as the next date and the program will automatically calculate the number of days left until your birthday.

This tool can calculate not only the number of days left until the next birthday, or how many days have passed since the last celebration. With the help of this utility, you can make calculations of a much wider scale.

The main condition is the start date calcuclation within the Common Era. For example, you can calculate the number of days from October 12, 1492 to today in a matter of seconds.

In this tool, the start date of the period and the last date in the period do not necessarily have to be in chronological order.