RFC-3339 vs ISO-8601

ijmacd.github.iosite

An giant list of formats from the two standards, how they overlaps, and live examples.

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2026-10-10

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1. ▲
   ISO-8601, YYYY, yyyy, and why your year may be wrong web.archive.org

   site category #falsehood link ↗

   String formatting of date is hard.

2. ▲
   iso-8601-date-formatter github.com

   tool category #ios link ↗

   A Cocoa NSFormatter subclass to convert dates to and from ISO-8601-formatted strings. Supports calendar, week, and ordinal formats.

   
3. ▲
   Awesome Identifiers adileo.github.io

   site category #iam link ↗

   A benchmark of all identifier formats.

4. ▲
   RFC3629 tools.ietf.org

   site category #microservices link ↗

   UTF-8, a transformation format of ISO 10646.

   
5. ▲
   JSON datatracker.ietf.org

   site category #integration link ↗

   A lightweight and easy-to-read data format that is widely used for data exchange. It supports a wide range of data types and is compatible with many programming languages.

   
6. ▲
   iso-8601-date gitlab.com

   site category #cl link ↗
   

Falsehood › Dates and Time: “An giant list of formats from the two standards, how they overlaps, and live examples.”