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by Eduard 1091 days ago
Also, they are safe to use within filenames and directory names (Filesystem paths) without conversion (at least in today's Filesystem not limited to e.g. 8.3 characters) .

Compare that with otherwise nice ISO 8601 datetime format (e.g. 2023-06-28T21:47:59+00:00): it requires conversion for file systems that don't allow colons and plus signs.