A date, made bigger
See the estimated number of people born around the world on any date in the dataset.
Your date, your day-one group
Pick a day, month, and year. We’ll estimate how many people were born worldwide that day and show where the largest shares were born.
The calculator keeps your date in this browser. Day Guestbook uses it only to open that day’s anonymous notes. Copying a share link includes the date you chose; there are still no profiles or public search.
Estimated births
This is an estimate of births, not a count of people alive today or a way to find individual people. It applies the project’s annual country birth totals and country-specific monthly birth patterns, then uses a normalized within-month daily allocation for leap and non-leap years.
