To know how old someone is, you calculate their age by subtracting their birthdate from the current date. The process involves:
- Determining how many full years have passed since the birthdate up to the last birthday,
- Counting the full months after that birthday until the current month,
- Then adding the remaining days from that month until today.
This can be done manually by date subtraction or using online tools and calculators that also take leap years into account for accuracy. If the exact birthdate is given, one can find the precise age in years, months, and days using these methods.
If needed, this calculation can also be done programmatically or with Excel formulas for automated precision.
