PDT
Pacific Daylight Time
GMT -7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CHAST
Chatham Island Standard Time
GMT +12:45
tomorrow
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

PDT is 19 hours and 45 minutes behind CHAST. PDT uses GMT -7, and CHAST uses GMT +12:45 for this comparison.

For example, 8:30 am PDT is 4:15 am CHAST. Use the converter above to adjust the date or time and create a shareable meeting link.

Best meeting overlap: 1:15pm-5pm PDT, which is 9am-12:45pm CHAST (next day).

Compare PDT time with CHAST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Pacific Daylight Time is 19 hours and 45 minutes behind Chatham Island Standard Time
8:30 am08:30 in PDT is 4:15 am04:15 in CHAST

PDT to CHAST call time
Best time for a conference call or a meeting is between 1:15pm-5pm in PDT which corresponds to 9am-12:45pm in CHAST (next day)

8:30 am08:30 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
4:15 am04:15 Chatham Island Standard Time (CHAST). Offset UTC +12:45 hours

8:30 am08:30 PDT / 4:15 am04:15 CHAST

PDTCHAST
12am (midnight)7:45 pm
1am8:45 pm
2am9:45 pm
3am10:45 pm
4am11:45 pm
5am12:45 am
6am1:45 am
7am2:45 am
8am3:45 am
9am4:45 am
10am5:45 am
11am6:45 am
12pm (noon)7:45 am
1pm8:45 am
2pm9:45 am
3pm10:45 am
4pm11:45 am
5pm12:45 pm
6pm1:45 pm
7pm2:45 pm
8pm3:45 pm
9pm4:45 pm
10pm5:45 pm
11pm6:45 pm
00:0019:45
01:0020:45
02:0021:45
03:0022:45
04:0023:45
05:0000:45
06:0001:45
07:0002:45
08:0003:45
09:0004:45
10:0005:45
11:0006:45
12:0007:45
13:0008:45
14:0009:45
15:0010:45
16:0011:45
17:0012:45
18:0013:45
19:0014:45
20:0015:45
21:0016:45
22:0017:45
23:0018:45

Pacific Daylight Time

Offset: PDT is 7 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the PDT time zone is Los Angeles in the United States, with about 3.793 million people. Other major cities in this time zone include Vancouver, Tijuana, San Diego, San Jose.

French: HAP - Heure Avancée du Pacifique

Spanish: PT - Zona Noroeste

PDT Time Zone Geo Map
PDT timezone map

Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Pacific Standard Time (PST).

Daylight saving time clock moves forward for one hour from 2am to 3amStart: Pacific Daylight Time (PDT) started on Sunday, March 8, 2026 at 2:00 am local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am. Daylight saving starts annually on the second Sunday of March

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Pacific Daylight Time (PDT) ends on Sunday, November 1, 2026 at 2:00 am local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am local standard time instead. Daylight saving ends annually on the first Sunday of November

PDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -07 - basic short
  • -0700 - basic
  • -07:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Tango - Military abbreviation for PDT
  • T - short form of 'Tango'
IANA/Olson: Reflects PDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Ensenada
  • America/Los_Angeles
  • America/Santa_Isabel
  • America/Tijuana
  • America/Vancouver
  • Canada/Pacific
  • Mexico/BajaNorte
  • PST8PDT
  • US/Pacific
Time zones with the GMT -7 offset:
  • MST - Mountain Standard Time
  • PDT - Pacific Daylight Time
  • YST - Yukon Standard Time
  • T - Tango Time Zone

Chatham Island Standard Time

Offset: CHAST is 12 hours and 45 minutes ahead Greenwich Mean Time (GMT) and is used in Pacific

Countries using this time zone: New Zealand

CHAST Time Zone Geo Map
CHAST timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Chatham Island Daylight Time (CHADT).

Start: Chatham Island Standard Time (CHAST) started on Sunday, April 5, 2026 at 3:45 am local time and clocks were set one hour back to Sunday, April 5, 2026, 2:45 am. Standard time starts annually on the first Sunday of April.

End: Chatham Island Standard Time (CHAST) ends on Sunday, September 27, 2026 at 2:45 am local time and clocks are set one hour forward to Sunday, September 27, 2026, 3:45 am local daylight time instead. Standard time ends annually on the last Sunday of September.

CHAST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1245 - basic
  • +12:45 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1245 - sign character (+) followed by a four digit time providing hours (12) and minutes (45) of the offset. Indicates an offset of twelve hours and forty-five minutes to the east of the zero meridian.