PDT to PST Converter
Convert time between Pacific Daylight Time (PDT) and Pacific Standard Time (PST)
Pacific Daylight Time (PDT)
Pacific Standard Time (PST)
Time Difference
Pacific Standard Time (PST) is 0 hours ahead of Pacific Daylight Time (PDT)
Select Date
Select Time
Quick Reference
| PDT | PST |
|---|---|
| 18:00 | 18:00 |
| 20:00 | 20:00 |
| 22:00 | 22:00 |
| 00:00 | 00:00 |
| 02:00 | 02:00 |
| 04:00 | 04:00 |
| 06:00 | 06:00 |
| 08:00 | 08:00 |
| 10:00 | 10:00 |
| 12:00 | 12:00 |
| 14:00 | 14:00 |
| 16:00 | 16:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
Related Time Zone Conversions
About PDT to PST Time Conversion
Pacific Daylight Time (PDT) and Pacific Standard Time (PST) represent the same geographic time zone but during different times of the year. PDT is UTC-7 and is used during daylight saving time (March to November), while PST is UTC-8 and is used during winter months (November to March). PST is exactly 1 hour behind PDT.
Understanding the reverse conversion from PDT to PST is essential for accurate scheduling, especially when planning events that span daylight saving time transitions. This converter helps you understand historical time records, coordinate with different seasons, and plan activities that might transition between daylight and standard time. Daylight saving time ends on the first Sunday of November in North America.
Common Use Cases for PDT to PST Conversion
Business & Work
- Converting summer schedules to winter schedules
- Understanding time records from daylight saving time periods
- Planning year-round events that change with seasons
- Coordinating historical time data across DST transitions
Personal & Travel
- Adjusting schedules as clocks change from daylight to standard time
- Planning winter events based on summer time references
- Understanding time differences in seasonal business operations
- Coordinating with contacts during DST transition periods
Time Zone Information
Pacific Daylight Time (PDT)
- UTC Offset: UTC-7
- IANA Timezone: America/Los_Angeles
- Daylight Saving: Second Sunday in March to First Sunday in November
- Major Cities: Los Angeles, San Francisco, Seattle, San Diego, Portland
- Coverage: Pacific United States and Canada (summer months)
Pacific Standard Time (PST)
- UTC Offset: UTC-8
- IANA Timezone: America/Los_Angeles
- Daylight Saving: First Sunday in November to Second Sunday in March
- Major Cities: Los Angeles, San Francisco, Seattle, San Diego, Portland
- Coverage: Pacific United States and Canada (winter months)
Quick Reference: PDT to PST
Remember: PST is always 1 hour behind PDT (during daylight saving time)