Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

ISO 8601

The standard date format that looks like 2026-09-26T14:30:00Z.

ISO 8601 is the international date-time interchange format (year-month-day, T, time, offset); .NET's round-trip format "o" produces it.

Examples

  • 2026-09-26T14:30:00Z is ISO 8601 for 14:30 UTC, and ToString("O") on a DateTimeOffset writes this format.

See also

UTC offset
Read the full section →