ヨーロッパから米国に電話をかけるのに最適な時期
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Calling the US from Europe is a daily puzzle for remote teams, families, and businesses. The Atlantic is wide: when it's a normal working afternoon in London or Berlin, most of the US is still asleep or just starting the day. Here's how to find a window that works for both sides.
Understanding the Gap
Europe runs on CET (UTC+1) in winter and CEST (UTC+2) in summer. The continental US spans several zones:
- Eastern (ET): UTC−5 winter / UTC−4 summer
- Central (CT): UTC−6 / −5
- Mountain (MT): UTC−7 / −6
- Pacific (PT): UTC−8 / −7
That puts Central Europe roughly 6 hours ahead of US Eastern in winter and 7 hours in summer (because Europe and the US switch DST on different dates).
Best Overlap Windows
| Europe (CET) | US Eastern (ET) | US Pacific (PT) | Quality |
|---|---|---|---|
| 2:00 PM | 8:00 AM | 5:00 AM | ET good, PT early |
| 3:00 PM | 9:00 AM | 6:00 AM | Both workable |
| 4:00 PM | 10:00 AM | 7:00 AM | Best shared window |
| 5:00 PM | 11:00 AM | 8:00 AM | ET good, PT fine |
| 6:00 PM | 12:00 PM | 9:00 AM | ET lunch, PT morning |
Practical Tips
- Target 3–5 PM CET / 9–11 AM ET. This is the sweet spot where both sides are awake and at work.
- Rotate the pain. If you work with one US counterpart daily, alternate who takes the early/late slot weekly.
- Watch DST gaps. For ~2 weeks each year (late March, early November) the offset shifts by an hour as the US and EU change clocks on different Sundays.
- Use a meeting planner. Our Meeting Planner finds the overlap automatically across any two cities.
Frequently Asked Questions
What is the best time to call the US East Coast from Europe?
3:00–5:00 PM Central European Time = 9:00–11:00 AM US Eastern. Both sides are at work.
How many hours ahead is Europe from the US?
Central Europe is 6 hours ahead of US Eastern in winter, 7 in summer.
Can I call the US West Coast from Europe at a normal hour?
Barely. 5 PM CET is 8 AM Pacific — workable but early for them. Better to let West Coast take the early shift.
Why does the time difference change during the year?
The US and EU start/end daylight saving on different dates, so the gap shifts by an hour for a couple of weeks each spring and autumn.
What tool helps schedule US–Europe calls?
A world clock for live times plus a meeting planner for finding overlap.
Use our world clock and meeting planner for live conversion.
ヨーロッパから米国東海岸を呼び出すのに最適な時期はいつですか？
中央ヨーロッパ時間午後3時～午後5時=米国東部時間午前9時～午前11時。双方が仕事をしています。
ヨーロッパはアメリカから何時間先ですか？
中央ヨーロッパは、冬には米国東部より6時間早く、夏には7時間早くなります。
通常の時間にヨーロッパから米国西海岸に電話をかけることはできますか？
かろうじてです。午後5時（中央ヨーロッパ時間）は太平洋標準時の午前8時です。実行可能ですが、彼らにとっては早い時間です。西海岸に早めのシフトをさせたほうがいい。
年内に時差が変わるのはなぜですか？
米国とEUでは夏時間が異なる日付で開始/終了するため、ギャップは毎年春と秋に数週間1時間ずつ変化します。
米国とヨーロッパの通話をスケジュールするのに役立つツールは何ですか？
ライブタイム用の世界時計と、重複を見つけるためのミーティングプランナー。