Date Format Converter
Convert any date into ISO, US, UK, SQL, Unix timestamp, and the common styles of 190+ countries, instantly and free.
The date 03/04/2025 means the third of April in one country and the fourth of March in another, and both readers are sure they’re right. That small difference is how visa forms get rejected, bookings land on the wrong day, and imported data quietly shifts by months. Type your date once and this tool shows it in every common notation side by side, so you can copy the exact style your form, database, or reader expects.
Quick Answer
Enter a date, choose “All Formats” for 16 common styles or “By Country” for one country’s usual formats, and click Convert Date. Every result has its own copy button.
How to Convert a Date Format
Type Your Date
Write it however you have it: 2024-12-31, 31/12/2024, December 31, 2024, or even a Unix timestamp.
Choose a Mode
“All Formats” shows everything at once. “By Country” lets you search a country and see the styles it commonly uses.
Convert and Copy
Click Convert Date, then copy whichever format you need with one click.
Key Features
16 Formats at Once
Results are grouped as Standard (ISO 8601, US, EU/UK, German, compact), Written (long, short, ordinal, with weekday), and Developer.
Date Format by Country
Search 190+ countries and get that country’s primary format highlighted, followed by the other styles commonly used there.
Developer Outputs
SQL/MySQL, RFC 2822, JSON ISO, a JavaScript Date line, and Unix timestamps in both seconds and milliseconds.
Forgiving Input
Reads slashes, dots, dashes, spelled-out months, YYYYMMDD, Chinese and Korean date notation, and Unix timestamps.
Copy Any Result
Every format has its own copy button, so there’s no selecting text by hand.
Written-Out Dates
Ordinals (“31st December 2024”) and full weekdays (“Tuesday, December 31, 2024”) are included for letters and documents.
Private by Design
The conversion happens in your browser; the date you enter is never uploaded.
What Does a Date Format Converter
It changes how a date is written, never which day it is. Three things differ between formats: the order of day, month, and year (day-first, month-first, or year-first), the separator between them (slash, dash, dot, or none), and whether the month is a number or a word. A converter takes one calendar day and rewrites it across all three. The days and months themselves don’t move, and no time or time zone gets added. Its real value is catching the case where a number looks valid in two formats but means different days.
When Would You Use This?
You’re filling in a visa, university, or bank form for another country and want the date in the style that country’s forms usually use.
You’re a developer who needs one date as an ISO string for an API, a SQL value for a query, and a Unix timestamp for a log, without writing a throwaway script.
You’re writing documentation or test data and want the same date shown in several formats side by side.
You’re drafting a contract or letter for a partner abroad and want the month spelled out (“31 December 2024”) so nobody has to guess between 03/04 and 04/03.
You’re simply curious how the same day is written in Japan, Germany, Brazil, or the United States, and want to see them all from one input.
Frequently Asked Questions
Why did 03/04/2025 convert to the date I didn’t expect?
That date is ambiguous. When both numbers could be a month, the tool reads it as day first, so 03/04/2025 becomes 3 April. If you meant March 4, type the month as a word (“March 4, 2025”) or use 2025-03-04. A number above 12 removes the doubt on its own.
Does it translate month and weekday names into other languages?
No, written months and weekdays always appear in English. What changes by country is the order and the separators, so a German result uses dots (31.12.2024) while a Japanese one uses the 年月日 style.
Can I convert a whole list of dates at once?
No, it converts one date at a time. It’s built for quickly checking or copying a single date in many formats.
What is the Unix timestamp based on?
It’s calculated from the date you entered at 12:00 noon in your device’s time zone, so it can differ from a timestamp for midnight UTC. Treat it as a quick reference, not a precise instant.
Are the country formats an official requirement?
They show the styles commonly used in each country. For a government or university form, follow the instructions printed on the form itself.
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