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EST to CHAST Converter

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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.
CHAST
Chatham Island Standard Time
GMT +12:45
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

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

EST and CHAST examples

These examples always use EST (UTC-5) and CHAST (UTC+12:45). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

EST is 17 hours and 45 minutes behind CHAST.

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

How the time difference changes

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

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in EDT correspond to 1:45 am (next day) to 9:45 am (next day) in CHAST, working hours of 9:00 am to 5:00 pm in EDT correspond to 2:45 am (next day) to 10:45 am (next day) in CHADT, or working hours of 9:00 am to 5:00 pm in EST correspond to 3:45 am (next day) to 11:45 am (next day) in CHADT.

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

Time Difference

Eastern Daylight Time is 16 hours and 45 minutes behind Chatham Island Standard Time
2:30 am02:30 in EDT is 7:15 pm19:15 in CHAST

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

2:30 am02:30 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
7:15 pm19:15 Chatham Island Standard Time (CHAST). Offset UTC +12:45 hours

2:30 am02:30 EDT / 7:15 pm19:15 CHAST

EDTCHAST
12am (midnight)4:45 pm
1am5:45 pm
2am6:45 pm
3am7:45 pm
4am8:45 pm
5am9:45 pm
6am10:45 pm
7am11:45 pm
8am12:45 am
9am1:45 am
10am2:45 am
11am3:45 am
12pm (noon)4:45 am
1pm5:45 am
2pm6:45 am
3pm7:45 am
4pm8:45 am
5pm9:45 am
6pm10:45 am
7pm11:45 am
8pm12:45 pm
9pm1:45 pm
10pm2:45 pm
11pm3:45 pm
00:0016:45
01:0017:45
02:0018:45
03:0019:45
04:0020:45
05:0021:45
06:0022:45
07:0023:45
08:0000:45
09:0001:45
10:0002:45
11:0003:45
12:0004:45
13:0005:45
14:0006:45
15:0007:45
16:0008:45
17:0009:45
18:0010:45
19:0011:45
20:0012:45
21:0013:45
22:0014:45
23:0015:45

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

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.
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT