Best time to call Warsaw from London
Best window: 9 AM–4 PM in London (10 AM–5 PM in Warsaw), both cities are inside 9 AM–5 PM office hours. Warsaw is 1 hour ahead of London. (as of July 2026, recalculated live in your browser.)
Live from your device clock via the IANA time-zone database built into your browser.
Hour-by-hour overlap
Both 9 AM–5 PM Both awake (7 AM–10 PM) One side asleep
| London | Warsaw | Call quality |
|---|---|---|
| 12 AM | 1 AM | Too early / too late |
| 1 AM | 2 AM | Too early / too late |
| 2 AM | 3 AM | Too early / too late |
| 3 AM | 4 AM | Too early / too late |
| 4 AM | 5 AM | Too early / too late |
| 5 AM | 6 AM | Too early / too late |
| 6 AM | 7 AM | Too early / too late |
| 7 AM | 8 AM | One side off-hours |
| 8 AM | 9 AM | One side off-hours |
| 9 AM | 10 AM | Both in office hours |
| 10 AM | 11 AM | Both in office hours |
| 11 AM | 12 PM | Both in office hours |
| 12 PM | 1 PM | Both in office hours |
| 1 PM | 2 PM | Both in office hours |
| 2 PM | 3 PM | Both in office hours |
| 3 PM | 4 PM | Both in office hours |
| 4 PM | 5 PM | One side off-hours |
| 5 PM | 6 PM | One side off-hours |
| 6 PM | 7 PM | One side off-hours |
| 7 PM | 8 PM | One side off-hours |
| 8 PM | 9 PM | One side off-hours |
| 9 PM | 10 PM | Too early / too late |
| 10 PM | 11 PM | Too early / too late |
| 11 PM | 12 AM +1 day | Too early / too late |
Grid prerendered July 2026 and recomputed in your browser on load, so daylight-saving switches are always reflected. Both London and Warsaw observe daylight saving time, but they switch on different dates, the gap between them shifts for a few weeks each spring and autumn.
Frequently asked questions
How many hours ahead is Warsaw of London?
Warsaw is 1 hour ahead of London. (Checked July 2026; where daylight saving applies, the gap can shift by an hour part of the year, the page recalculates live.)
What time is 9 AM in London in Warsaw?
9 AM in London is 10 AM in Warsaw.
Do London and Warsaw change clocks for daylight saving?
Both London and Warsaw observe daylight saving time, but they switch on different dates, the gap between them shifts for a few weeks each spring and autumn.
Which hours work for a call?
Best window: 9 AM–4 PM in London (10 AM–5 PM in Warsaw), both cities are inside 9 AM–5 PM office hours.