The short answer
3am in Chatham Standard Time is 3:15pm in British Summer Time on the previous day.
Chatham Standard Time is 11 hours 45 minutes ahead of British Summer Time. It falls outside the 9-to-5 in Chatham Standard Time but lands inside working hours in British Summer Time.
Chatham Standard Time☾
3am
British Summer Time☀
3:15pm
previous day
Right now
9:53pm+12:45 · UTC+12:45 · Sun, Aug 30
10:08amBST · UTC+01:00 · Sun, Aug 30
Read across to convert
Chatham Standard Time
+12:45 · UTC+12:45
British Summer Time
BST · UTC+01:00
Pinned3amChatham Standard Time=3:15pmBritish Summer Time · Sat (previous day)
12amSun
12:15pmSat ·−1d
WORK1am
1:15pmSat ·−1d
WORK2am
2:15pmSat ·−1d
WORKPINNED
3am
3:15pmSat ·−1d
WORK4am
4:15pmSat ·−1d
WORK5am
5:15pmSat ·−1d
6am
6:15pmSat ·−1d
7am
7:15pmSat ·−1d
8am
8:15pmSat ·−1d
9am
WORK9:15pmSat ·−1d
10am
WORK10:15pmSat ·−1d
11am
WORK11:15pmSat ·−1d
12pm
WORK12:15amSun
1pm
WORK1:15am
2pm
WORK2:15am
3pm
WORK3:15am
4pm
WORK4:15am
5pm
5:15am
6pm
6:15am
7pm
7:15am
8pm
8:15am
NOW
9pm
9:15am
WORK10pm
10:15am
WORK11pm
11:15am
WORKdaylightnightworking hoursoverlap
Best time to meet
No shared working hours.
Chatham Standard Time and British Summer Time are too far apart for a working-day overlap. The least-unsociable option is an early-morning call on one side and an evening one on the other — or hand work off asynchronously and let the planet do the waiting.
Popular conversions
Quick reference.
9amChatham Standard Time=9:15pmBritish Summer Time · prev day
12pmChatham Standard Time=12:15amBritish Summer Time
3pmChatham Standard Time=3:15amBritish Summer Time
5pmChatham Standard Time=5:15amBritish Summer Time
9pmChatham Standard Time=9:15amBritish Summer Time
In context
What each side covers.
Chatham Standard Time
9:53pm+12:45 · UTC+12:45
Chatham Standard Time
British Summer Time
10:08amBST · UTC+01:00
Cities on this clock
Related converters
Other popular pairs.
Pacific Time
2:08am
India Standard Time
2:38pm
Pacific Time to India12 hours 30 minutes behind
Eastern Daylight Time
5:08am
Central European Time
11:08am
Eastern Time to Central Europe6 hours behind
India Standard Time
2:38pm
Eastern Daylight Time
5:08am
India to Eastern Time9 hours 30 minutes ahead
British Summer Time
10:08am
India Standard Time
2:38pm
London to India4 hours 30 minutes behind
Pacific Daylight Time
2:08am
Eastern Daylight Time
5:08am
Pacific to Eastern Time3 hours behind
Central European Time
11:08am
India Standard Time
2:38pm
Central Europe to India3 hours 30 minutes behind
Frequently asked
Quick answers about converting between Chatham Standard Time and British Summer Time. Can't find what you need? Email [email protected].
- What is the time difference between Chatham Standard Time and British Summer Time?
- Chatham Standard Time is 11 hours 45 minutes ahead of British Summer Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.
- When it's 3am in Chatham Standard Time, what time is it in British Summer Time?
- 3am in Chatham Standard Time is 3:15pm in British Summer Time on the previous day. It falls outside the 9-to-5 in Chatham Standard Time but lands inside working hours in British Summer Time. Use the hour-by-hour table above to read any other time across.
- What's the best time for a call between Chatham Standard Time and British Summer Time?
- There's no comfortable 9-to-5 overlap between Chatham Standard Time and British Summer Time — they sit on opposite sides of the planet's working day. Plan for an early or late call on one side, or hand work off asynchronously.
- Does this account for daylight saving time?
- Yes. We track every clock change in both places, so the abbreviations you see — +12:45 and BST — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.
- Why is the date sometimes different on each side?
- When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.