What is the best time to call the US from the UK?

For Eastern and Central time zones, UK afternoon is usually best. For Pacific time, late UK afternoon or early evening is often needed.

Why do UK-US call times change in March and October?

The UK and the United States change clocks on different dates, so the normal time gap can shift by one hour during transition weeks.

What is the safest UK-US call window for mixed US teams?

A 16:00 or 17:00 UK call is often the most practical compromise for Eastern, Central and some Pacific participants, but Pacific attendees may still be early.

Should a UK invite use EST, EDT or New York time?

Use America/New_York or New York time instead of EST or EDT unless the offset is explicitly checked for the exact date.

Chrono Time guide

Best time to call UK and USA teams without time zone mistakes

The best UK-US call time depends on the exact US city, the meeting type and the date. UK afternoon is usually the cleanest overlap for Eastern and Central teams, while Pacific teams often require late UK afternoon or early evening.

US region	Good UK call window	Typical US local time	Use case
Eastern time	14:00 to 17:00 UK	09:00 to 12:00 New York	Sales calls, support handoffs, leadership meetings.
Central time	15:00 to 18:00 UK	09:00 to 12:00 Chicago	Operations, customer calls and planning sessions.
Mountain time	16:00 to 18:00 UK	09:00 to 11:00 Denver	Short meetings where the UK side can stay late.
Pacific time	17:00 to 19:00 UK	09:00 to 11:00 Los Angeles	Important calls only, because this pushes the UK day late.

Start with the US city, not just the country

The United States spans several time zones. A call that works for New York may be too early for Los Angeles. When inviting a US contact, ask for the city or IANA time zone, then use the time zone converter before sending the meeting invite.

Daylight-saving transition weeks

The UK and the US do not always change clocks on the same weekend. During those weeks, a normal five-hour London-New York gap can briefly become four hours. That can move a recurring 14:00 London call from 09:00 to 10:00 in New York, or shift another region by one hour.

Check the exact date whenever a call is close to a clock-change weekend. The US normally changes in March and November, while the UK changes in March and October, so recurring calls can look correct for most of the year and still be wrong during those transition gaps.

Decision rules by call type

For customer calls, choose a time that sits comfortably inside the customer business day, even if the internal team has to flex. For internal project calls, rotate the burden if a Pacific or Mountain team repeatedly joins before 09:00. For urgent support handoffs, write both city times in the ticket or agenda so nobody has to infer the offset from an abbreviation.

Call type	Recommended UK slot	Reason
London and New York sales call	14:30 to 16:30 UK	Both sides are inside normal business hours and there is room for follow-up the same day.
UK with US West Coast	17:00 to 18:30 UK	This usually lands after 09:00 Pacific without pushing the UK team too late.
All-hands with multiple US zones	16:00 to 17:00 UK	Eastern and Central are comfortable, Mountain is workable and Pacific is early but possible.

Real-world examples

If a London team wants a reliable weekly call with New York, 15:00 London is usually a strong default because it lands around late morning in New York. If the US team is in California, 17:30 London is often the earliest practical time for a normal business call.

For calls involving several US time zones, avoid optimizing for one coast only. A 16:00 UK call can be reasonable for Eastern and Central participants, but still early for Pacific participants.

For a London, Chicago and Los Angeles planning call, start by testing 17:00 UK. That is usually late morning in Chicago and morning in Los Angeles. If the London team cannot meet that late every week, alternate between a live call and written updates instead of forcing one side into a poor slot permanently.

Quick checklist before sending the invite

Check	What to confirm	Why it prevents mistakes
City	Ask whether the US attendee is in New York, Chicago, Denver, Phoenix, Los Angeles or another city.	US states and teams can span several offsets.
Date	Convert the meeting on the exact calendar date, not a generic offset.	UK and US DST transition weeks can change the gap.
Label	Write city names in the invite, such as London and New York.	EST, EDT, CST and IST are easy to misuse or misunderstand.
Fairness	Rotate late UK calls if Pacific attendees are required every week.	A technically valid time can still be unfair over repeated meetings.

When to avoid a live call

A live call is not always the best answer. If the only workable slot is after 19:00 UK or before 08:00 Pacific, consider an async update, a recorded walkthrough or a split meeting by region. For decision-heavy meetings, collect written comments first and reserve the live call for unresolved topics.

FAQ

Is 14:00 UK always 09:00 New York?

No. It is usually true, but daylight-saving transition weeks can change the gap by one hour.

What is the fairest US-wide meeting time?

16:00 to 17:00 UK is often the least bad compromise, but Pacific participants may still be early.

Should invites say EST or New York?

Use New York or America/New_York. EST is wrong during daylight saving time.

What if the US team is spread across several states?

Use the westernmost required attendee as the constraint, then check whether the UK side can reasonably meet late enough.

Is Friday a good day for UK-US calls?

Friday can work for short operational calls, but avoid late UK Friday slots for decisions that need same-day follow-up.

What should I put in the calendar title?

Use a clear title and include both city times in the description, for example 15:00 London / 10:00 New York.