Date, Age & Business Days Calculator
Find the exact duration between two dates, calculate your chronological age, and count working business days.
What does the Date Calculator do and how to use it?
The Herramix Date Calculator combines three practical time utilities into one tabbed interface: Date Difference, Age Calculator, and Business Days Counter. Whether you are tracking project deadlines, legal notice periods, vacation days, or birthdays, results appear as soon as you pick your dates.
Use Date Difference to get both the calendar breakdown (years, months, and days) and total days, weeks, and hours. Switch to Age Calculator to see your exact age in years, months, and days along with a countdown to your next birthday. Or pick Business Days to count Monday-through-Friday working days and optionally deduct public holidays.
Usage example
Scenario: You want to count the working business days from November 1, 2026 to November 30, 2026 (inclusive), with 1 public holiday falling on a weekday.
Result: Out of 30 calendar days, there are 21 weekdays (Mon–Fri) and 9 weekend days. Subtracting 1 holiday leaves 20 net business days.
Frequently Asked Questions
Does the date calculator account for leap years?
Yes. All calculations run on UTC timestamps using the Gregorian calendar, so Daylight Saving Time shifts never distort day counts and leap years (February 29) are handled accurately.
How are business days counted?
Business days count every Monday through Friday between the start and end dates (both inclusive), excluding Saturdays and Sundays. You can also enter the number of public holidays to subtract them from the weekday total.
How is exact age in years, months, and days calculated?
The calculator compares your birth date with the reference date to find completed years first, then completed months, and finally remaining days based on the actual length of the preceding month.