Date Format Converter
A Date Format Converter lets you parse any date or date-time string and instantly display it in multiple international formats. Whether you need ISO 8601 for APIs, MM/DD/YYYY for US documents, DD/MM/YYYY for European forms, or a Unix timestamp for programming, this tool handles them all from a single input.
Different regions and software systems store and display dates in incompatible ways. Misreading a date format is a common source of bugs and miscommunication. This converter removes the ambiguity by showing your date in every major format at once, with one-click copying so you can paste the right format wherever it's needed.
How it works
Parsing uses the ECMAScript Date object (ISO 8601 is parsed natively). The Unix timestamp is calculated as Math.floor(date.getTime() / 1000), where getTime() returns milliseconds since 1970-01-01T00:00:00Z. US and EU formats are composed by zero-padding month, day, and year components. Long localized output uses the browser's Intl.DateTimeFormat API with the appropriate locale.
Use cases
- Converting a date from an API response (ISO 8601) into a human-readable format for display
- Translating US dates (MM/DD/YYYY) into EU format (DD/MM/YYYY) when working with international teams
- Obtaining the Unix timestamp of a specific date for use in database queries or shell scripts
- Quickly finding the weekday for any date without a calendar
- Cross-checking date inputs before inserting them into spreadsheets, contracts, or legal documents