Time zones and daylight saving

Your hours are stored in your IANA time zone (e.g. America/New_York). Visitors see times in their browser's zone and can switch to any zone. On days when clocks change, your local hours are kept: 9:00–17:00 stays 9:00–17:00 local time, and times that don't exist (the skipped hour) are never offered.

Emails show the time in the recipient's zone; calendar files use UTC, so calendar apps convert them correctly.