RFC3339 is better than ISO8601 since it doesn’t allow some of the esoteric formats, and allows some useful formats that ISO8601 doesn’t (like separating date and time by a space instead of by T)
For example, 2026-W32-1 is also a valid ISO8601 date: Monday on the 32nd week of 2026. That format isn’t allowed with RFC3339.
I read this meme and was physically revolted and wanted to immediately down vote. Great job.
The superior date format is, of course, ISO 8601. YYYY-MM-DD.
RFC3339 is better than ISO8601 since it doesn’t allow some of the esoteric formats, and allows some useful formats that ISO8601 doesn’t (like separating date and time by a space instead of by
T)For example,
2026-W32-1is also a valid ISO8601 date: Monday on the 32nd week of 2026. That format isn’t allowed with RFC3339.https://ijmacd.github.io/rfc3339-iso8601/