How Old Is Someone Born in 1979?
Get exact age with precise calendar calculations including years, months, days, and next birthday countdown.
This calculator uses calendar-exact arithmetic to determine your precise age. It accounts for varying month lengths, leap years, and provides multiple unit breakdowns for comprehensive age information.
Calculation Method:
- Years, Months, Days: Precise calendar counting with proper month boundary handling
- Total Units: Converted to months, weeks, and days for different perspectives
- Next Birthday: Calculated considering the current year and leap years
For complete methodology details, visit our methodology page.
Why does the month/day vary by calculation method?
Different calculation methods handle month boundaries differently. Our calendar-exact method counts actual days, while some methods use average month lengths. We use precise calendar arithmetic for accuracy.
Can I include time of birth for more precision?
Yes, use the Advanced section to include your birth time. This provides age calculations down to hours, minutes, and seconds for maximum precision.
How do past vs future reference dates work?
You can set any reference date to see your age on that specific date. Past dates show historical age, future dates show projected age.
Do timezone differences affect the calculation?
For date-level precision, timezone differences typically don't matter. However, if you include birth time, timezone can affect calculations by a few hours.
Is my birth date information stored anywhere?
No, all calculations are performed entirely in your browser. No personal birth information is stored or transmitted to our servers.