The short answer
5am in Chatham Standard Time is 5:15pm in Greenwich Mean Time on the previous day.
Chatham Standard Time is 11 hours 45 minutes ahead of Greenwich Mean Time. That's already evening in Greenwich Mean Time, after the typical working day ends.
Chatham Standard Time☾
5am
Greenwich Mean Time☀
5:15pm
previous day
Right now
10:26am+12:45 · UTC+12:45 · Thu, Jun 25
10:41pmBST · UTC+01:00 · Wed, Jun 24
Read across to convert
Chatham Standard Time
+12:45 · UTC+12:45
Greenwich Mean Time
BST · UTC+01:00
Pinned5amChatham Standard Time=5:15pmGreenwich Mean Time · Wed (previous day)
12amThu
12:15pmWed ·−1d
WORK1am
1:15pmWed ·−1d
WORK2am
2:15pmWed ·−1d
WORK3am
3:15pmWed ·−1d
WORK4am
4:15pmWed ·−1d
WORKPINNED
5am
5:15pmWed ·−1d
6am
6:15pmWed ·−1d
7am
7:15pmWed ·−1d
8am
8:15pmWed ·−1d
9am
WORK9:15pmWed ·−1d
NOW
10am
WORK10:15pmWed ·−1d
11am
WORK11:15pmWed ·−1d
12pm
WORK12:15amThu
1pm
WORK1:15am
2pm
WORK2:15am
3pm
WORK3:15am
4pm
WORK4:15am
5pm
5:15am
6pm
6:15am
7pm
7:15am
8pm
8:15am
9pm
9:15am
WORK10pm
10:15am
WORK11pm
11:15am
WORKdaylightnightworking hoursoverlap
Best time to meet
No shared working hours.
Chatham Standard Time and Greenwich Mean 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=9:15pmGreenwich Mean Time · prev day
12pmChatham Standard Time=12:15amGreenwich Mean Time
3pmChatham Standard Time=3:15amGreenwich Mean Time
5pmChatham Standard Time=5:15amGreenwich Mean Time
9pmChatham Standard Time=9:15amGreenwich Mean Time
In context
What each side covers.
Chatham Standard Time
10:26am+12:45 · UTC+12:45
Chatham Standard Time
Greenwich Mean Time
10:41pmBST · UTC+01:00
Cities on this clock
Related converters
Other popular pairs.
Pacific Time
2:41pm
India Standard Time
3:11am
Pacific Time to India12 hours 30 minutes behind
Eastern Standard Time
5:41pm
Central European Time
11:41pm
Eastern Time to Central Europe6 hours behind
India Standard Time
3:11am
Eastern Standard Time
5:41pm
India to Eastern Time9 hours 30 minutes ahead
Greenwich Mean Time
10:41pm
India Standard Time
3:11am
London to India4 hours 30 minutes behind
Pacific Standard Time
2:41pm
Eastern Standard Time
5:41pm
Pacific to Eastern Time3 hours behind
Central European Time
11:41pm
India Standard Time
3:11am
Central Europe to India3 hours 30 minutes behind
Frequently asked
Quick answers about converting between Chatham Standard Time and Greenwich Mean Time. Can't find what you need? Email [email protected].
- What is the time difference between Chatham Standard Time and Greenwich Mean Time?
- Chatham Standard Time is 11 hours 45 minutes ahead of Greenwich Mean 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 5am in Chatham Standard Time, what time is it in Greenwich Mean Time?
- 5am in Chatham Standard Time is 5:15pm in Greenwich Mean Time on the previous day. That's already evening in Greenwich Mean Time, after the typical working day ends. 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 Greenwich Mean Time?
- There's no comfortable 9-to-5 overlap between Chatham Standard Time and Greenwich Mean 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.