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CHADT to EST Converter

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CHAST/CHADT
Chatham Island Standard Time
GMT +12:45
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CHADT is not used on September 21, 2026

This converter uses CHAST for Chatham Island.

Keep CHADT (GMT +13:45)
EDT/EST
Eastern Daylight Time
GMT -4
12am
3am
6am
9am
12pm
3pm
6pm
9pm
EST is not used on this date
This converter uses EDT (GMT -4), the offset New York uses on this date. Open the EDT converter.

Quick answers

Selected conversion

The selected date and time will appear here when the converter loads.

CHADT and EST examples

These examples always use CHADT (UTC+13:45) and EST (UTC-5). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

CHADT is 18 hours and 45 minutes ahead of EST.

EST uses UTC-5 during standard time. For Eastern Time that follows daylight saving time, use CHADT to ET. For daylight-time examples, use CHADT to EDT.

How the time difference changes

Depending on seasonal clock changes, CHAST is 16 hours and 45 minutes ahead of EDT, CHADT is 17 hours and 45 minutes ahead of EDT, or CHADT is 18 hours and 45 minutes ahead of EST.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in CHAST correspond to 4:15 pm (previous day) to 12:15 am in EDT, working hours of 9:00 am to 5:00 pm in CHADT correspond to 3:15 pm (previous day) to 11:15 pm (previous day) in EDT, or working hours of 9:00 am to 5:00 pm in CHADT correspond to 2:15 pm (previous day) to 10:15 pm (previous day) in EST.

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

Time Difference

Chatham Island Standard Time is 16 hours and 45 minutes ahead of Eastern Daylight Time
9:30 pm21:30 in CHAST is 4:45 am04:45 in EDT

CHAST to EDT call time
Best time for a conference call or a meeting is between 9am-9:45am in CHAST which corresponds to 4:15pm-5pm in EDT (previous day)

9:30 pm21:30 Chatham Island Standard Time (CHAST). Offset UTC +12:45 hours
4:45 am04:45 Eastern Daylight Time (EDT). Offset UTC -4:00 hours

9:30 pm21:30 CHAST / 4:45 am04:45 EDT

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

Chatham Island Daylight Time

Offset: CHADT is 13 hours and 45 minutes ahead Greenwich Mean Time (GMT) and is used in Pacific

CHADT Time Zone Geo Map
CHADT timezone map

Daylight Saving: Chatham Island Daylight Time (CHADT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Chatham Island Standard Time (CHAST).

End: Chatham Island Daylight Time (CHADT) ended 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 local standard time instead. Daylight saving ends annually on the first Sunday of April

Start: Chatham Island Daylight Time (CHADT) starts 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. Daylight saving starts annually on the last Sunday of September

CHADT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1345 - basic
  • +13:45 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1345 - sign character (+) followed by a four digit time providing hours (13) and minutes (45) of the offset. Indicates an offset of thirteen hours and forty-five minutes to the east of the zero meridian.

Eastern Standard Time

Offset: EST is 5 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries using this time zone: Canada, Jamaica, Cayman Islands, Mexico, Panama

Principal Cities: The largest city in the EST time zone is Kingston in Jamaica, with about 937,700 people. Other major cities in this time zone include Cancun, New Kingston, Panama, San Miguelito.

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

EST Time Zone Geo Map
EST 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 Eastern Daylight Time (EDT).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Eastern Standard Time (EST) ended 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 local daylight time instead. Standard time ends annually on the second Sunday of March.

Daylight saving time clock moves back for one hour from 2am to 1amStart: Eastern Standard Time (EST) starts 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. Standard time starts annually on the first Sunday of November.

EST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for EST
  • R - short form of 'Romeo'
IANA/Olson: Reflects EST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Atikokan
  • America/Cancun
  • America/Cayman
  • America/Coral_Harbour
  • America/Detroit
  • America/Fort_Wayne
  • America/Grand_Turk
  • America/Indiana/Indianapolis
  • America/Indiana/Marengo
  • America/Indiana/Petersburg
  • America/Indiana/Vevay
  • America/Indiana/Vincennes
  • America/Indiana/Winamac
  • America/Indianapolis
  • America/Iqaluit
  • America/Jamaica
  • America/Kentucky/Louisville
  • America/Kentucky/Monticello
  • America/Louisville
  • America/Montreal
  • America/Nassau
  • America/New_York
  • America/Nipigon
  • America/Panama
  • America/Pangnirtung
  • America/Port-au-Prince
  • America/Thunder_Bay
  • America/Toronto
  • Canada/Eastern
  • EST
  • EST5EDT
  • Jamaica
  • US/East-Indiana
  • US/Eastern
  • US/Michigan
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT