Question 1

How do I use this calculator?

Accepted Answer

Enter a start and end date, optionally with times. Multiple date formats are supported (e.g. 2023-01-01, 2023/01/01, 2023.01.01, 20230101). Times use 24-hour format. On blur, fields normalize and results refresh.

Question 2

How do I calculate exact age?

Accepted Answer

Use birth date as the start and current date as the end (try the “Now” preset). You’ll see exact age, full years, nominal age (+1 tradition), days lived, zodiac sign, and Chinese zodiac.

Question 3

How do workdays work?

Accepted Answer

Select which weekdays count as working days and optionally exclude China public holidays using simplified fixed rules. The tool reports working days, non-working days, estimated work hours at 8h/day, and a ratio.

Question 4

What special calculations are included?

Accepted Answer

Elapsed percentage while “now” is inside the range, countdown/count-up text, relative wording, add time from the start datetime, and an anniversary list.

Question 5

How do presets help?

Accepted Answer

Presets quickly set common dates/times such as birth date, start/end of year/month, Monday/Sunday, yesterday/tomorrow, and now.

Question 6

How do I copy results?

Accepted Answer

On the Difference tab, use the Copy button next to each aggregate value to copy the number to your clipboard.

Age and Date Difference Calculator