US Time Zone Converter

Example Calculation

A meeting set for 3:00 pm Eastern is 2:00 pm Central, 1:00 pm Mountain, and 12:00 pm Pacific. The same time is 11:00 am in Alaska, and 9:00 am in Hawaii while daylight saving time is on (10:00 am the rest of the year).

In 2026, daylight saving time runs from March 8 to November 1. Arizona (most of the state) and Hawaii do not change their clocks, so the gap to them moves by one hour twice a year. Always pick the date when you convert.

How It Works

The continental United States spans four main time zones — Eastern, Central, Mountain and Pacific — and Alaska and Hawaii add two more. Scheduling a call, a webinar or a flight across these zones is easy to get wrong, especially around daylight saving time changes. This converter shows the same moment in every US zone at once.

Pick the time zone you are starting from, then choose a date and time. The tool converts your local clock time into an exact universal moment (UTC) using your browser’s built-in international time zone database, then displays what the clock reads in each other zone, including the weekday and date. That means a late-evening meeting in Pacific Time correctly shows up as the next day in Eastern Time.

Daylight saving time in most of the US begins on the second Sunday in March and ends on the first Sunday in November. Because the tool uses the date you enter, it automatically shows EDT or EST, CDT or CST, MDT or MST, and PDT or PST as appropriate. Arizona (outside the Navajo Nation) and Hawaii do not observe daylight saving time, so their offset from other zones changes during the year — Arizona matches Pacific Time in summer and Mountain Time in winter.

For best results when scheduling, include the time zone abbreviation in every invitation, avoid ambiguous phrases like “my time,” and double-check events near the March and November transitions. The table also includes UTC so you can coordinate with international teammates. Rules and offsets come from the IANA time zone database built into modern browsers, so they stay up to date with your device.

Formula Explained

UTC = local time − UTC offset of the origin zone on that date

Local time (target) = UTC + UTC offset of the target zone on that date. Offsets include daylight saving where it applies.

Assumptions and limits

• Daylight saving time is applied for the date you choose, using the IANA time zone database built into your browser.
• Most of Arizona and Hawaii do not observe daylight saving time.
• Only the main US zones and UTC are listed. Local rule changes after your device’s data was last updated are not known.
• Times of day that do not exist, or happen twice, on a daylight saving change date are resolved by the browser’s rules.