Zone & HourGMT to PST Time Converter
PST is 8 hours behind of GMT.
GMT: Greenwich Mean Time, UTC+00:00.
PST: Pacific Standard Time, UTC−08:00.
For a city that changes clocks, use the date-aware city converter.
Check the abbreviation before converting
PST can also be used for Philippine Standard Time (UTC+08:00). Here it exclusively means Pacific Standard Time.
Convert a time
9:00 AM GMT = 1:00 AM PST (same day)
24-hour GMT to PST conversion table
These are fixed-offset examples. They apply whenever the two abbreviations have the exact meanings stated above.
| GMT · UTC+00:00 | PST · UTC−08:00 | Day |
|---|---|---|
| 12:00 AM | 4:00 PM | Previous day |
| 1:00 AM | 5:00 PM | Previous day |
| 2:00 AM | 6:00 PM | Previous day |
| 3:00 AM | 7:00 PM | Previous day |
| 4:00 AM | 8:00 PM | Previous day |
| 5:00 AM | 9:00 PM | Previous day |
| 6:00 AM | 10:00 PM | Previous day |
| 7:00 AM | 11:00 PM | Previous day |
| 8:00 AM | 12:00 AM | Same day |
| 9:00 AM | 1:00 AM | Same day |
| 10:00 AM | 2:00 AM | Same day |
| 11:00 AM | 3:00 AM | Same day |
| 12:00 PM | 4:00 AM | Same day |
| 1:00 PM | 5:00 AM | Same day |
| 2:00 PM | 6:00 AM | Same day |
| 3:00 PM | 7:00 AM | Same day |
| 4:00 PM | 8:00 AM | Same day |
| 5:00 PM | 9:00 AM | Same day |
| 6:00 PM | 10:00 AM | Same day |
| 7:00 PM | 11:00 AM | Same day |
| 8:00 PM | 12:00 PM | Same day |
| 9:00 PM | 1:00 PM | Same day |
| 10:00 PM | 2:00 PM | Same day |
| 11:00 PM | 3:00 PM | Same day |
What GMT and PST mean
GMT: Greenwich Mean Time
GMT has a fixed zero offset. London observes BST during its daylight-saving season; London is not always on GMT. A representative location is London in winter, whose IANA identifier is Europe/London.
PST: Pacific Standard Time
This page uses North American PST, UTC−08:00. Los Angeles changes to PDT (UTC−07:00) during daylight saving. A representative location is Los Angeles in winter, whose IANA identifier is America/Los_Angeles.
Common conversion examples
- 6:00 AM GMT becomes 10:00 PM PST on the previous day.
- 9:00 AM GMT becomes 1:00 AM PST.
- 12:00 PM GMT becomes 4:00 AM PST.
- 6:00 PM GMT becomes 10:00 AM PST.
- 9:00 PM GMT becomes 1:00 PM PST.
Frequently asked questions
Does this table change for daylight saving?
No. The offsets attached to these abbreviations stay fixed. A city may switch to a differently named abbreviation. GMT is not a daylight-saving designation in the interpretation used here.
Should I put an abbreviation in a meeting invitation?
Use an IANA city time zone and a full date. Abbreviations are useful shorthand when everyone agrees on the meaning, but they do not carry the complete rules that a calendar needs for recurring events.
Why can the day change?
The difference is 480 minutes. Adding or subtracting that amount can move the destination time before midnight or beyond the end of the source day. The last column makes that change explicit.