Castle Rock to AKDT Time Converter

Updating current time…
Castle Rock
Colorado, USAMDT
UTC−6
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Castle Rock's clocks go back 1 hour on Sun, Nov 1 · MDT → MST
AKDT
Alaska Daylight Time
UTC−8
2h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

6:00 am06:00 MDT (UTC-6), Oct 29, 2026 = 4:00 am04:00 AKDT (UTC-8), Oct 29, 2026

Castle Rock is 2 hours ahead of AKDT.

How the time difference changes

For most of the year, Castle Rock is 2 hours ahead of AKDT. From Nov 1, 2026 to Mar 14, 2027, Castle Rock is 2 hours ahead of AKST. Briefly around clock changes, Castle Rock is 3 hours ahead of AKST or Castle Rock is 1 hour ahead of AKDT.

For most of the year, working hours of 9:00 am to 6:00 pm in Castle Rock correspond to 7:00 am to 4:00 pm in AKDT. At other times of the year, working hours of 9:00 am to 6:00 pm in Castle Rock correspond to 7:00 am to 4:00 pm in AKST.For most of the year, working hours of 09:00 to 18:00 in Castle Rock correspond to 07:00 to 16:00 in AKDT. At other times of the year, working hours of 09:00 to 18:00 in Castle Rock correspond to 07:00 to 16:00 in AKST.

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

Time Difference

MDT (Mountain Daylight Time) is 2 hours ahead of Alaska Daylight Time.
6:00 am06:00 in Castle Rock, CO, USA is 4:00 am04:00 in AKDT

Castle Rock to AKDT call time
Best time for a conference call or a meeting is between 11am-6pm11:00-18:00 in Castle Rock which corresponds to 9am-4pm09:00-16:00 in AKDT

6:00 am06:00 MDT (Mountain Daylight Time) (Castle Rock, CO, USA). Offset UTC -6:00 hours
4:00 am04:00 Alaska Daylight Time (AKDT). Offset UTC -8:00 hours

6:00 am06:00 Castle Rock, CO, USA / 4:00 am04:00 AKDT

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Hourly time comparison
Castle Rock, CO, USAAKDT
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Castle Rock Time Zone and Facts

Time Zone

Abbreviation / Offset
MDT – Mountain Daylight Time, UTC-6 (now, daylight saving time)
MST – Mountain Standard Time, UTC-7 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, November 1, 2026 at 2:00 amSunday, November 1, 2026 at 02:00: clocks go back 1 hour to 1:00 am01:00 (MST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (MDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Clock Changes
USA daylight saving time · Clock changes worldwide

Castle Rock Facts

Country
USA
State
Colorado
Alternative Names
Kasl Rok, Kasul Rok, cheng bao shi, kasl rak klradw, kasl rwk, kyasala raka, Касл Рок, Касъл Рок, كاسل روك, کاسل راک، کلرادو, کیسل راک، کولوراڈو, क्यासल रक, 城堡石
Population
55,591
Currency
Dollar (USD)
Geographic Coordinates
39° 22' N Latitude / 104° 51' W Longitude
International Dialing Code
+1
More About Castle Rock
Castle Rock local time and city facts

Alaska Daylight Time

Offset: AKDT is 8 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: United States

Principal Cities: The largest city in the AKDT time zone is Anchorage in the United States, with about 289,600 people. Other major cities in this time zone include Fairbanks, Juneau, Knik-Fairview, Wasilla.

Map of the areas on Alaska Daylight Time (AKDT)
AKDT part of the year

Today all shaded areas are on AKDT.

Open the world time zone map© OpenStreetMap

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

123456789101112Start: Alaska Daylight Time (AKDT) started on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.

123456789101112End: Alaska Daylight Time (AKDT) ends on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.

See USA daylight saving time and upcoming clock changes worldwide.

AKDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -08 - basic short
  • -0800 - basic
  • -08:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Uniform - Military abbreviation for AKDT
  • U - short form of 'Uniform'
IANA/Olson: Reflects AKDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Anchorage
  • America/Juneau
  • America/Metlakatla
  • America/Nome
  • America/Sitka
  • America/Yakutat
  • US/Alaska
Time zones with the GMT -8 offset:
  • AKDT - Alaska Daylight Time
  • PST - Pacific Standard Time
  • PT - Pacific Time
  • PST - Pitcairn Standard Time
  • U - Uniform Time Zone