Smart Tools

Date Format Converter

Convert dates between ISO 8601, US, European, RFC 2822 and Unix - single, batch, or find-and-reformat in any text.

What are we doing

Mode

One date, every format Many dates, one chosen format Find and reformat dates inside a block of text

Input

Enter a date

Dates to convert Paste a column from a spreadsheet - newlines and tabs are handled.

Text containing dates Useful for cleaning up messy reports, emails or logs.

Source format

How to read the input

Custom input pattern Tokens: yyyy year, MM month number, MMM short month, dd day, HH hour 24h, mm minute, ss second.

Input time zone

Specific input time zone

Locale for parsing month and day names

Output format

Convert to

Custom output pattern

Output time zone

Specific output time zone

Locale for output month and day names

Adjust on the fly (optional)

Add or subtract before formatting Applied to every parsed date before it is rendered in the new format.

Display

Show the same date in every common format

Flag ambiguous inputs (like 03/04/2025)

Flag invalid or unparseable values

Preserve original line order in batch mode

the same date, reformatted

Parsed as -

Detected format -

Inputs accepted -

Ambiguous -

Invalid -

Time zone shift applied -

The same date in every format

Click any row to copy that single value.

Converted batch

One row per input. Invalid or ambiguous values are highlighted.

Reformatted text

Original text with all detected dates replaced by their new format.

Warnings

Type or paste any date - see every format it can take, instantly.

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