On the 12th of September, 2024, a person born on the 19th of September, 1987, would be 36 years old.

Would you like more details or have any other questions?

Here are 5 related questions you might find interesting:

1. How do we calculate someone's exact age including months and days?
2. How many days are there between two specific dates?
3. How does leap year affect age calculations?
4. How can we calculate a person's age in months?
5. What is the difference between date calculations in different calendar systems?

Tip: When calculating someone's age, always check if the current date has passed their birthday for the year!