Question 1

What counts as a business day?

Accepted Answer

A business day is a weekday (Monday through Friday) that is not a public holiday. Our calculators allow you to exclude weekends and a list of common public holidays for accurate business day calculations.

Question 2

How is age calculated?

Accepted Answer

Age is calculated as the complete duration from the date of birth to the current date, expressed in years, months, and days. We account for leap years to ensure the highest accuracy.

Question 3

Is my data private?

Accepted Answer

Yes. All calculations happen directly in your browser. We do not store any personal information you enter into the calculators. Your data never leaves your device.

Question 4

Can I use these tools on my mobile device?

Accepted Answer

Absolutely! DateKeep is designed to be fully responsive, which means it works seamlessly on desktops, tablets, and smartphones. All features are available on any device.

Question 5

How accurate are the time and date calculations?

Accepted Answer

Our calculators use a reliable and widely-used date-fns library for all calculations. This ensures high accuracy, including accounting for complexities like leap years. For time-sensitive operations like the countdown timer, accuracy depends on your device's clock.

Question 6

What is a Unix Timestamp?

Accepted Answer

A Unix timestamp represents a point in time. It is the number of seconds that have elapsed since midnight UTC on January 1, 1970. It's a common standard used in computing.

Question 7

What is a Julian Date?

Accepted Answer

A Julian Date or Julian Day Number (JDN) is the continuous count of days since the beginning of the Julian period (January 1, 4713 BC). It is used primarily in astronomy to provide a single, unambiguous system for dating events without confusion over different calendar systems or time zones.