~/ISO 8601

Oct 12, 2022

The command date --iso-8601=ns --utc outputs the current date and time in UTC, formatted to ISO 8601.

2022-10-11T11:03:12.123456789+0000

Here’s a breakdown of the format:

• 2022-10-11 (year-month-day)
• T separates the date and time
• 11:03:12.123456789 (hours:minutes:seconds.nanoseconds)
• +0000 indicates the UTC time zone

References

• RFC 3339 IETF
• ISO 8601 ISO.org
• ISO 8601 Wikipedia