Portsmouth Time to CST Converter
CST is 6 hours behind GMT. 9:00 AM GMT = 3:00 AM CST.
CST is 6 hours behind GMT at the moment. To convert Portsmouth Time to CST, subtract 6 hours from the Portsmouth Time time: 9:00 AM GMT = 3:00 AM CST.
Portsmouth Time (Portsmouth time) is used in Portsmouth, UK. CST (Central Time) is used in Chicago, Dallas, Houston, Minneapolis, New Orleans, Winnipeg; Mexico City and Central America use UTC−6 all year.
CST here means North American Central Standard Time, not China Standard Time.
Portsmouth Time to CST time conversion table
Portsmouth Time to CST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| Portsmouth Time | CST |
|---|---|
| 12:00 AM | 6:00 PM−1 |
| 1:00 AM | 7:00 PM−1 |
| 2:00 AM | 8:00 PM−1 |
| 3:00 AM | 9:00 PM−1 |
| 4:00 AM | 10:00 PM−1 |
| 5:00 AM | 11:00 PM−1 |
| 6:00 AM | 12:00 AM |
| 7:00 AM | 1:00 AM |
| Portsmouth Time | CST |
|---|---|
| 8:00 AM | 2:00 AM |
| 9:00 AM | 3:00 AM |
| 10:00 AM | 4:00 AM |
| 11:00 AM | 5:00 AM |
| 12:00 PM | 6:00 AM |
| 1:00 PM | 7:00 AM |
| 2:00 PM | 8:00 AM |
| 3:00 PM | 9:00 AM |
| Portsmouth Time | CST |
|---|---|
| 4:00 PM | 10:00 AM |
| 5:00 PM | 11:00 AM |
| 6:00 PM | 12:00 PM |
| 7:00 PM | 1:00 PM |
| 8:00 PM | 2:00 PM |
| 9:00 PM | 3:00 PM |
| 10:00 PM | 4:00 PM |
| 11:00 PM | 5:00 PM |
Conversion table from Portsmouth Time to CST for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in CST, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert Portsmouth Time to CST
Subtract 6 hours from the Portsmouth Time time to get CST.
Example: 9:00 AM GMT = 3:00 AM CST.
Across midnight: 1:00 AM GMT = 7:00 PM CST (previous day). The date changes, so always check the day as well as the hour.
Time difference between Portsmouth Time and CST
The time difference between Portsmouth Time and CST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 7 Mar 2026: CST is 6 hours behind of Portsmouth Time.
- 8 Mar 2026 – 28 Mar 2026: CST is 5 hours behind of Portsmouth Time.
- 29 Mar 2026 – 24 Oct 2026: CST is 6 hours behind of Portsmouth Time.
- 25 Oct 2026 – 31 Oct 2026: CST is 5 hours behind of Portsmouth Time.
- 1 Nov 2026 – 31 Dec 2026: CST is 6 hours behind of Portsmouth Time.
Portsmouth Time and CST during daylight saving time
- Portsmouth Time next changes on 28 Mar 2027: clocks go forward one hour at 00:59 local time, from GMT (UTC+0) to BST (UTC+1).
- CST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from CST (UTC−6) to CDT (UTC−5).
Best time for a meeting between Portsmouth Time and CST
Portsmouth Time and CST share 2 hours of the 9 AM–5 PM working day. Any time between 3:00 PM and 5:00 PM GMT lands between 9:00 AM and 11:00 AM CST, inside working hours for both.
Portsmouth Time to CST FAQ
What is the time difference between Portsmouth Time and CST?
Right now CST is 6 hours behind GMT. The gap changes 5 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM Portsmouth Time in CST?
9:00 AM GMT is 3:00 AM CST.
What is 12 PM (noon) Portsmouth Time in CST?
12:00 PM GMT is 6:00 AM CST.
Is CST ahead of or behind Portsmouth Time?
CST is 6 hours behind GMT, so it is earlier in CST than in Portsmouth Time.
Does Portsmouth Time change for daylight saving time?
Yes. Portsmouth Time next changes on 28 Mar 2027, when clocks go forward one hour from GMT to BST.
Does CST change for daylight saving time?
Yes. CST next changes on 14 Mar 2027, when clocks go forward one hour from CST to CDT.
What is the best time for a meeting between Portsmouth Time and CST?
Portsmouth Time and CST share 2 hours of the 9 AM–5 PM working day. Any time between 3:00 PM and 5:00 PM GMT lands between 9:00 AM and 11:00 AM CST, inside working hours for both.
Is CT the same as CST?
CST is the winter (standard) name of Central Time (CT). From March to November the same clocks are called CDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert CST to Portsmouth Time
Convert Portsmouth Time to other time zones
Convert other time zones to CST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.