UltConvert
Image11
Image ConverterCompress ImageResize ImageCrop ImageImage to PDFPassport Photo MakerImage to SVGAll Image tools →
PDF13
Compress PDFPDF ConverterPDF to ImageMerge PDFSplit PDFUnlock PDFProtect PDFAll PDF tools →
Documents & Data7
Convert to PDFDocument ConverterImage to TextImage to ExcelData ConverterEbook ConverterAll Documents & Data tools →
Video6
Video ConverterCompress VideoVideo to AudioVideo to GIFTrim VideoAudio to VideoAll Video tools →
Audio4
Audio ConverterCompress AudioTrim AudioAudio to TextAll Audio tools →
More tools9
QR Code GeneratorZip FilesUnzip OnlinePixel ConverterFont ConverterAll other tools →
BlogHow it works

PST to UTC Converter

Pick a date and a Pacific time to get the UTC time. The converter knows whether California is on PST (UTC−8) or PDT (UTC−7) on that date.

Pacific Time

PSTPacific Time

UTCCoordinated Universal Time

––:––

+8 h

Hours to add to a PST time to get UTC, from November to March

From the second Sunday of March to the first Sunday of November California is on PDT, and you add 7 hours instead. UTC itself never changes.

Pacific Time to UTC hour table

PST timePST · UTCPDT · UTC
12:00 AM8:00 AM7:00 AM
1:00 AM9:00 AM8:00 AM
2:00 AM10:00 AM9:00 AM
3:00 AM11:00 AM10:00 AM
4:00 AM12:00 PM11:00 AM
5:00 AM1:00 PM12:00 PM
6:00 AM2:00 PM1:00 PM
7:00 AM3:00 PM2:00 PM
8:00 AM4:00 PM3:00 PM
9:00 AM5:00 PM4:00 PM
10:00 AM6:00 PM5:00 PM
11:00 AM7:00 PM6:00 PM
12:00 PM8:00 PM7:00 PM
1:00 PM9:00 PM8:00 PM
2:00 PM10:00 PM9:00 PM
3:00 PM11:00 PM10:00 PM
4:00 PM12:00 AM+1 next day11:00 PM
5:00 PM1:00 AM+1 next day12:00 AM+1 next day
6:00 PM2:00 AM+1 next day1:00 AM+1 next day
7:00 PM3:00 AM+1 next day2:00 AM+1 next day
8:00 PM4:00 AM+1 next day3:00 AM+1 next day
9:00 PM5:00 AM+1 next day4:00 AM+1 next day
10:00 PM6:00 AM+1 next day5:00 AM+1 next day
11:00 PM7:00 AM+1 next day6:00 AM+1 next day
Every Pacific hour with its UTC equivalent in both seasons. From 4:00 PM Pacific in winter, or 5:00 PM in summer, UTC is already on the next date (+1).

What UTC is

Coordinated Universal Time is the world's reference time scale. The BIPM computes it from atomic clocks kept by national laboratories, and inserts the occasional leap second so that it stays close to the Earth's rotation. Time zones are defined as offsets from it: Pacific Standard Time is UTC−8, Pacific Daylight Time UTC−7.

UTC has no daylight saving, which is exactly why software, aviation and science use it. A UTC timestamp means the same instant everywhere.

  1. Dec 31, 2025 – Mar 8, 2026PST UTC−8 · UTC UTC+0Difference: +8 h
  2. Mar 8, 2026 – Nov 1, 2026PDT UTC−7 · UTC UTC+0Difference: +7 h
  3. Nov 1, 2026 – Mar 14, 2027PST UTC−8 · UTC UTC+0Difference: +8 h
  4. Mar 14, 2027 – Nov 7, 2027PDT UTC−7 · UTC UTC+0Difference: +7 h
  5. Nov 7, 2027 – Dec 31, 2027PST UTC−8 · UTC UTC+0Difference: +8 h

Offsets in 2026 – 2027, from the IANA time zone data in your browser's engine

Pacific Time in logs and code

Local Pacific time is awkward for machines. On the second Sunday of March the clock jumps from 1:59 AM to 3:00 AM, so 2:30 AM never happens. On the first Sunday of November 1:00–1:59 AM happens twice. A log written in local time cannot tell those two hours apart; a UTC log can.

Schedule jobs in UTC as well. A task set for 9:00 AM Pacific runs at 17:00 UTC in winter and 16:00 UTC in summer, so a UTC cron entry has to change twice a year if it must follow the Pacific clock.

Do

  • Store and compare times in UTC, with the Z suffix or a +00:00 offset.
  • Convert to Pacific Time only when you show a time to a person.

Avoid

  • Writing PST in summer logs; the offset then is −07:00, not −08:00.
  • Running a local-time job between 1:00 and 3:00 AM on a change night.

To read a UTC time back in California, use UTC to PST. For the UK clock, see PST to GMT and the live clock for London.

PST to UTC questions

How do I convert PST to UTC?

Add 8 hours to a PST time. During daylight saving, when California is on PDT, add 7 hours instead.

What is 5:00 PM Pacific in UTC?

5:00 PM PST is 01:00 UTC the next day, and 5:00 PM PDT is 00:00 UTC the next day.

Does UTC change for daylight saving?

No. UTC is a fixed reference and never moves. Only the Pacific side switches between UTC−8 and UTC−7.

What does the Z at the end of a timestamp mean?

Z marks a time in UTC, as in 2026-03-08T10:00:00Z. Aviation and the military read it as Zulu time.

Should servers store times in Pacific Time or UTC?

Store UTC and convert to Pacific Time only for display. UTC has no gaps or repeated hours, while Pacific Time skips an hour in March and repeats one in November.