Tonga
TST
Montana, USA
MDT

Time Difference

TST (Tonga Standard Time) is 19 hours ahead of MDT (Mountain Daylight Time)
6:00 pm18:00 in Lapaha, Tonga is 11:00 pm23:00 in Helena, MT, USA

Lapaha to Helena call time
Best time for a conference call or a meeting is between 10:30pm-12:30pm in Lapaha which corresponds to 3:30am-5:30am in Helena

6:00 pm18:00 TST (Tonga Standard Time) (Lapaha, Tonga). Offset UTC +13:00 hours
11:00 pm23:00 MDT (Mountain Daylight Time) (Helena, MT, USA). Offset UTC -6:00 hours

6:00 pm18:00 Lapaha, Tonga / 11:00 pm23:00 Helena, MT, USA

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

Lapaha 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.

Lapaha Facts

Country
Tonga
Alternative Names
Lapaha
Population
8,000
Currency
Pa'anga (TOP)
Geographic Coordinates
21° 10' S Latitude / 175° 07' W Longitude
International Dialing Code
+676

Helena Information

Time Zone

Abbreviation / Name
MDT - Mountain Daylight Time
HAR - Heure Avancée des Rocheuses
UTC / GMT Offset
-6:00 hours during Mountain Daylight Time, currently in use.
-6:00 hours during Heure Avancée des Rocheuses.
Daylight Saving Time Change
0:00 hours - DST is in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hour from 2am to 3am Sunday, March 10, 2024 at 2:00 am local time. DST starts annually the on second Sunday of March. Clocks are turned forward 0 hour to Sunday, March 10, 2024, 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves back for one hour from 2am to 1am Sunday, November 3, 2024 at 2:00 am local time. DST ends annually the on first Sunday of November. Clocks are turned backward 0 hour to Sunday, November 3, 2024, 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.

Helena Facts

Country
USA
State
Montana
Alternative Names
Chelena, Crabtown, Epl Yuts'mn, Epł Yuts’mn, Gelena, HLN, Helena, Helena i Montana, Helenopolis, Helina, Hopkinsville, Khehlena, Khelena, Last Chance Gulch, he lei na, helena, hellena, herena, hlna mwntana, hlnh, hylyna, Χέλενα, Гелена, Хелена, Хэлена, Հելենա, הלנה, هلنا، مونتانا, هيلينا, ہیلینا, ہیلینا، مونٹانا, हेलेना, ஹெலேனா, เฮเลนา, ヘレナ, 赫勒拿, 헬레나
Population
30,581
Currency
Dollar (USD)
Geographic Coordinates
46° 35' N Latitude / 112° 02' W Longitude
International Dialing Code
+1