One-hour coordination, still date-aware
London and Berlin usually maintain a one-hour difference under the sampled rules. A London late-afternoon meeting can reach Berlin’s workday boundary earlier than the organizer expects. Include the end time, not just the start, when deciding whether a 60- or 90-minute call fits.
London, GB: Europe/London (city ID: london).
Berlin, DE: Europe/Berlin (city ID: berlin).
Does the difference change?
The destination-minus-source differences sampled on the 15th of each month in 2027 are +1h. These are dated examples, not a promise of fixed offsets or a complete historical range. A different reference date may have different rules.
| Source date | London | Berlin |
|---|---|---|
| 2027-01-16 | 10:00 Greenwich Mean Time | 2027-01-16 · 11:00 Same day · Central European Standard Time |
| 2027-07-16 | 10:00 British Summer Time | 2027-07-16 · 11:00 Same day · Central European Summer Time |
Daylight-saving rules depend on the city and date. When a local hour is missing or repeated, the converter rejects it or asks which occurrence you mean. Rules can change politically; reconfirm far-future meetings.