Date Format Converter
Converts date display format
🧮 Date Format Converter — Converts date display format
Separate day, month, and year fields reduce typing mistakes compared with one long date string.
What This Calculator Does ✨
You enter dates in separate day, month, and year boxes. The calculator finds years, months, and days in order. Leap years and different month lengths are handled for you.
You will fill in: Date input, From format, To format. Each field is clearly labeled so mistakes are less likely. ✅
Why use this page instead of counting manually?
Converts date display format Hand-rolled date math often misses leap years or varying month lengths—the engine on this page applies the same rules every time.
Tips for Accurate Results ✅
- Double-check day and month were not swapped.
- Leap-day births: confirm how your form treats February 29 in non-leap years.
- Run Calculate again after changing only the target date.
- Compare with a second source for life-changing legal decisions.
Who is this page for?
Anyone filling PDF or paper forms that ask for age on a specific day, not today.
How to use the Date Format Converter 📝
- Find the Date Format Converter form in the left column of this page.
- Fill in: Date input, From format, To format.
- Verify day and month were not swapped (a very common error).
- Press Calculate and wait for the result panel to update.
- Copy, screenshot, or write down the answer if you need it for a form.
Examples 📊
Here are two sample runs. Your real dates will give your own personal result.
Example 1
Input: Date: 15-05-2000; From: DD-MM-YYYY; To: YYYY-MM-DD
Output: 2000-05-15
Example 2
Input: DOB: 01-01-2018; Target: 01-06-2026
Output: 8 years, 5 months
Date Format Converter — common questions ❓
Each question below refers to this calculator by name and to the fields on its form.
What is the Date Format Converter used for?
Converts date display format On this page you will enter: Date input, From format, To format.
Does the Date Format Converter show years, months, and days together?
Converts date display format Enter: Date input, From format, To format.
What result might I see from the Date Format Converter?
Example: with u201cDate: 15-05-2000; From: DD-MM-YYYY; To: YYYY-MM-DDu201d the page can show u201c2000-05-15u201d. Your own dates will produce a different personal answer.
Where is my data stored when I use the Date Format Converter?
Dates you type are processed to show a result. This site does not need to keep your birth date on a server for the math to work.