How many hours is PST behind GST?
As abbreviations, GST is always 12 hours ahead of PST: PST is UTC−8 and GST is UTC+4. To convert, add 12 hours.
Check which label you actually need: PST (Pacific Time is on PDT today). A time written with an abbreviation that is not in use is usually meant as the local time, so convert between the places instead: right now GST is 11 hours ahead of PST.
When the PST to GST time difference changes
For most of the year GST is 11 hours ahead of PST. From 1 November to 31 December 2026, GST is 12 hours ahead of PST instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
| Dates | GST vs PST | Length |
|---|---|---|
| 8 March 2026 to 31 October 2026 | 11 hours ahead | 238 days |
| 1 November 2026 to 31 December 2026 | 12 hours ahead | 61 days |
| 1 January 2027 to 13 March 2027 | 12 hours ahead | 72 days |
| 14 March 2027 to 6 November 2027 | 11 hours ahead | 238 days |
| 7 November 2027 to 31 December 2027 | 12 hours ahead | 55 days |
Best time for a meeting between PST and GST
- When GST is 11 hours ahead of PST: no shared 09:00 to 17:00 hours; try 07:00 in PST (18:00 in GST).
- When GST is 12 hours ahead of PST: no shared 09:00 to 17:00 hours; try 07:00 in PST (19:00 in GST).