TIMEZONE REFERENCEDjango · ZoneInfo · UTC

Timezone inspector

Read-only · no account or persistence

Try the account timezone flow

Sign in. Use demouser / demopassword on the demo profile. This is a shared teaching account.
Save an account timezone. Select a zone on the profile. Event display follows that saved setting across visits; UTC timestamps stay unchanged.
Compare events. Try New York, Los Angeles, and Tokyo. The winter/summer examples show DST differences; the near-midnight event can change calendar date.
Simulate travel. Change the “Simulated browser timezone” dropdown. It exercises detection without changing your device settings.
Accept or dismiss. The popup suggests the new timezone. Only acceptance updates your account. Repeat the same from → to transition to see it suppressed in this browser session.

This demo uses saved account time + opt-in suggestions. “Follow device automatically” is a different valid product choice; Google Calendar offers that option. The inspector below remains anonymous and read-only.

Local —

UTC —

Detecting browser timezone… Device clock · 1s refresh

Runtime configuration

Source	Value
`settings.TIME_ZONE`	`UTC`
`settings.USE_TZ`	`True`
`connection.vendor`	`postgresql`
`connection.timezone_name`	`UTC`
Browser IANA zone	`Detecting…`
Browser offset at sample instant	`—`

The connection timezone controls database conversion, separately from the display timezone.

Browser detection

Intl.DateTimeFormat().resolvedOptions().timeZone

Reads the browser’s setting; no GPS or IP lookup.

Client-side inspection only. No requests, cookies, or storage writes from detection.

U.S. regions & territories live

Region / IANA zone	Time · 24h	Date / offset
Eastern`America/New_York`	—	—
Central`America/Chicago`	—	—
Mountain`America/Denver`	—	—
Pacific`America/Los_Angeles`	—	—
Alaska`America/Anchorage`	—	—
Hawaii`Pacific/Honolulu`	—	—
Arizona`America/Phoenix`	—	—
Aleutians (DST)`America/Adak`	—	—
Atlantic · Puerto Rico / USVI`America/Puerto_Rico`	—	—
Samoa · American Samoa`Pacific/Pago_Pago`	—	—
Chamorro · Guam / N. Mariana Is.`Pacific/Guam`	—	—
Wake Island`Pacific/Wake`	—	—

Covers the nine U.S. standard zones, Arizona/Hawaii DST differences, and Wake Island. Offsets come from Intl. The profile dropdown also includes regional IANA histories such as Indiana, Kentucky, and Alaska localities.

Timestamp representations fixed at page render

Representation	Value	Conversion
UTC / ISO 8601	`2026-10-02T01:41:55.723121+00:00`	`timezone.now().isoformat()`
Prepared DB value · not saved	`Oct. 2, 2026, 1:41 a.m.`	`connection.ops.adapt_datetimefield_value(dt)`
Browser-local display	`Detecting…`	`Intl.DateTimeFormat().format(date)`

All three rows represent one instant. The clocks above advance independently using the device clock; this server sample stays fixed. A zone name carries DST rules; a UTC offset alone does not.