Updating current time…
MDT
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Puerto RicoAST
UTC−4
2h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

6:00 am06:00 MDT (UTC-6), Oct 15, 2026 = 8:00 am08:00 AST (UTC-4), Oct 15, 2026

MDT is 2 hours behind Caguas.

How the time difference changes

For most of the year, MDT is 2 hours behind Caguas. From Nov 1, 2026 to Mar 14, 2027, MST is 3 hours behind Caguas.

For most of the year, working hours of 9:00 am to 6:00 pm in MDT correspond to 11:00 am to 8:00 pm in Caguas. At other times of the year, working hours of 9:00 am to 6:00 pm in MST correspond to 12:00 pm to 9:00 pm in Caguas.For most of the year, working hours of 09:00 to 18:00 in MDT correspond to 11:00 to 20:00 in Caguas. At other times of the year, working hours of 09:00 to 18:00 in MST correspond to 12:00 to 21:00 in Caguas.

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

Time Difference

Mountain Daylight Time is 2 hours behind AST (Atlantic Standard Time).
6:00 am06:00 in MDT is 8:00 am08:00 in Caguas, Puerto Rico

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

6:00 am06:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours
8:00 am08:00 AST (Atlantic Standard Time) (Caguas, Puerto Rico). Offset UTC -4:00 hours

6:00 am06:00 MDT / 8:00 am08:00 Caguas, Puerto Rico

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Hourly time comparison
MDTCaguas, Puerto Rico
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Mountain Daylight Time

Offset: MDT is 6 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the MDT time zone is Ciudad Juárez in Mexico, with about 1.512 million people. Other major cities in this time zone include Calgary, Edmonton, Denver, El Paso.

French: HAR - Heure Avancée des Rocheuses

Spanish: MT - Zona Pacífico

Map of the areas on Mountain Daylight Time (MDT)
MDT part of the year

Today all shaded areas are on MDT.

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

123456789101112Start: Mountain Daylight Time (MDT) 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: Mountain Daylight Time (MDT) 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 upcoming clock changes worldwide.

MDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for MDT
  • S - short form of 'Sierra'
IANA/Olson: Reflects MDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Boise
  • America/Cambridge_Bay
  • America/Ciudad_Juarez
  • America/Denver
  • America/Edmonton
  • America/Inuvik
  • America/Shiprock
  • America/Yellowknife
  • Canada/Mountain
  • MST7MDT
  • Navajo
  • US/Mountain
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone

Caguas Time Zone and Facts

Time Zone

Abbreviation / Offset
AST – Atlantic Standard Time, UTC-4 (no daylight saving time)

Caguas Facts

Country
Puerto Rico
Alternative Names
Kaguas, Kaguasas, Kagvas, ka gua si, kaguasu, kaguraasa, Кагвас, Кагуас, קגואס, کاگواس، پورٹو ریکو, কাগুৱাস, カグアス, 卡瓜斯
Population
86,804
Currency
Dollar (USD)
Geographic Coordinates
18° 14' N Latitude / 66° 02' W Longitude