UTC to PST time converter

Example with the default inputs (Time 17:00, From UTC (Coordinated Universal Time), To Los Angeles (US Pacific), Date September 30, 2026) on the example date Wednesday, September 30, 2026: 5:00 PM on September 30, 2026 in UTC (Coordinated Universal Time) is 10:00 AM on Wednesday, September 30, 2026 in Los Angeles (US Pacific).

Method: Find the instant (UTC) at which the From zone’s clocks show the date and time, then read the To zone’s clock at that instant; both offsets come from the browser’s IANA time zone data.

• By default this page converts UTC (Coordinated Universal Time) to Los Angeles (US Pacific): the IANA tzdata zones UTC and America/Los_Angeles; the browser supplies their offsets and daylight saving rules (checked against tzdata 2026a), so a rule change arrives with a browser update.
• A time that does not exist in the From zone (skipped when clocks spring forward) has no answer. A time that occurs twice (when clocks fall back) shows both results, earlier first, for every output that differs.
• The difference is the To zone’s UTC offset minus the From zone’s, as “3 hours ahead”, “9 hours 30 minutes behind”, or “the same time”.
• “Difference changes next” is the first moment after the typed time, within 366 days, at which the difference changes: the new difference, then that moment as the From zone’s local date and time (“2 hours ahead from Saturday, October 31, 2026, 11:00 PM”).
• Each zone shows its name and abbreviation from the browser’s Unicode CLDR English names (left out when CLDR has none), then its offset as UTC+hh:mm or UTC−hh:mm.
• Dates from 2000 to 2040 work.

Machine-readable copies: Markdown, JSON.