Tonga
TST
CIST
Cook Islands Standard Time
GMT -10

Time Difference

TST (Tonga Standard Time) is 23 hours ahead of Cook Islands Standard Time
7:00 pm19:00 in Nuku'alofa, Tonga is 8:00 pm20:00 in CIST

Nuku'alofa to CIST call time
Best time for a conference call or a meeting is between 12:30pm-2:30pm in Nuku'alofa which corresponds to 1:30am-3:30am in CIST

7:00 pm19:00 TST (Tonga Standard Time) (Nuku'alofa, Tonga). Offset UTC +13:00 hours
8:00 pm20:00 Cook Islands Standard Time (CIST). Offset UTC -10:00 hours

7:00 pm19:00 Nuku'alofa, Tonga / 8:00 pm20:00 CIST

Nuku'alofa, Tonga CIST
12am (midnight) 1am
1am 2am
2am 3am
3am 4am
4am 5am
5am 6am
6am 7am
7am 8am
8am 9am
9am 10am
10am 11am
11am 12pm (noon)
12pm (noon) 1pm
1pm 2pm
2pm 3pm
3pm 4pm
4pm 5pm
5pm 6pm
6pm 7pm
7pm 8pm
8pm 9pm
9pm 10pm
10pm 11pm
11pm 12am (midnight)
0:00 1:00
1:00 2:00
2:00 3:00
3:00 4:00
4:00 5:00
5:00 6:00
6:00 7:00
7:00 8:00
8:00 9:00
9:00 10:00
10:00 11:00
11:00 12:00
12:00 13:00
13:00 14:00
14:00 15:00
15:00 16:00
16:00 17:00
17:00 18:00
18:00 19:00
19:00 20:00
20:00 21:00
21:00 22:00
22:00 23:00
23:00 0:00

Nuku'alofa Information

Time Zone

Abbreviation / Name
TST - Tonga Standard Time
TOT - Tonga Time
UTC / GMT Offset
+13:00 hours during Tonga Standard Time, currently in use.
+13:00 hours during Tonga Time.
Daylight Saving Time Change
0:00 hours - DST is NOT in use
Daylight Saving Time Starts
Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Also called Fall Back or switch to Winter Time.

Nuku'alofa Facts

Country
Tonga
Alternative Names
Niukalofa, Noukoualopha, Nucualofa, Nukalofa, Nuku'alofa, Nuku`alofa, Nuku`aloia, Nukualofa, Nukuʻalofa, Nuku‘alofa, Nuku‘aloia, Nuku’alofa, TBU, nu ku a luo fa, nu kuxalofa, nukuallopa, nukuarofa, Νουκουαλόφα, Нукуалофа, נוקואלופה, นูกูอะโลฟา, ኑኩአሎፋ, ヌクアロファ, 努库阿洛法, 努庫阿洛發, 누쿠알로파
Population
22,400
Currency
Pa'anga (TOP)
Geographic Coordinates
21° 08' S Latitude / 175° 12' W Longitude
International Dialing Code
+676

Cook Islands Standard Time

Offset: CIST is 10 hours behind Greenwich Mean Time (GMT) and is used in Pacific

CIST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -10 - basic short
  • -1000 - basic
  • -10:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -1000 - sign character (-) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates ten hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Whiskey - Military abbreviation for CIST
  • W - short form of 'Whiskey'
Time zones with the GMT -10 offset:
  • HAST - Hawaii-Aleutian Standard Time
  • CKT - Cook Island Time
  • HST - Hawaii Standard Time
  • TAHT - Tahiti Time
  • W - Whiskey Time Zone