Date Formatter

What the Date Formatter Does

The Date Formatter takes a single date and time and shows it in every common notation at once: ISO 8601, US and European ordering, long and short written forms, 12 and 24 hour times, Unix timestamps, and timezone offsets. Pick a moment with the date and time field, or press the button to jump to the current time, and the whole list updates instantly. Each row has a copy button, so getting a correctly formatted string into code, a spreadsheet, or a document takes one click.

A second input accepts custom patterns built from tokens like YYYY, MM, DD, and HH. The result appears in the card at the top of the results column and recalculates on every keystroke. Everything runs locally in the browser, so the tool works offline and never sends dates anywhere.

How to Use the Formatter

1. Choose a date and time, or press Use Current Time to start from now.
2. Review the format table. Every row shows a named format and its formatted value.
3. Click the copy button on any row to put that exact string on your clipboard.
4. Type a pattern into the custom format field to build your own layout, such as dddd, MMMM D, YYYY.

Custom Pattern Tokens

• Year: YYYY gives 2026, YY gives 26.
• Month: MMMM gives January, MMM gives Jan, MM gives 01, M gives 1.
• Day: DD gives 04, D gives 4, dddd gives Saturday, ddd gives Sat.
• Time: HH is 24 hour, hh is 12 hour, mm is minutes, ss is seconds, and A is AM or PM.
• Extras: Z inserts the timezone offset like +05:30, and X inserts the Unix timestamp in seconds.

Unknown characters pass through untouched, so separators like slashes, dashes, commas, and even words keep working in the pattern.

Which Format Should You Use?

Store dates in ISO 8601 whenever you control the pipeline. The YYYY-MM-DDTHH:mm:ss layout sorts correctly as text, avoids the day versus month ambiguity of numeric formats, and is understood by virtually every parser and database. Use localized layouts like MM/DD/YYYY or DD/MM/YYYY only for display, and only when the audience is known, because 04/07/2026 means April 7 in one convention and July 4 in another.

For machines talking to each other, timestamps matter too. Unix seconds and milliseconds are compact, timezone free, and trivial to compare, which is why logging and APIs use them so heavily. The RFC 2822 line produces the format used in HTTP headers and email, handy when you need to construct those by hand.

Related Date Tools

To move a date forward or backward by days, weeks, months, or years, use the Date Calculator. To measure the span between two dates, the Find Date Difference tool reports days, weeks, months, and years. When you are working with raw numbers instead of calendars, the Epoch & Unix Timestamp Converter goes both directions, and Find Week of Year answers the ISO week question.