Illustrative example. The dates and amounts below are provided for practice.
A photograph labeled “June 2025” may have been taken before or after the subject's birthday. If the capture date is known to be June 17, use that exact date before writing the caption.
Reproduce the age
Enter Date of Birth June 18, 2000 and Calculate Age As Of June 17, 2025. The output is 24 years, 11 months, and 30 days. Change the reference to June 18 and the result becomes exactly 25 years.
Subtracting the two year numbers gives 25 in both runs, but only the second date has reached the birthday. The month-and-day comparison explains the difference.
Preserve uncertainty honestly
If the day is unknown, do not substitute June 17 merely because it produces a convenient answer. Calculate the earliest and latest plausible dates, then describe the range or use an approximate caption.
Total Days Lived counts elapsed date intervals. An inclusive “day of life” would be one larger, and neither total is needed for the completed-age caption.
The birthday year is required here. A month and day alone can support a countdown but cannot establish the age of someone in an old photograph.