Offset
The time difference between Mountain Time and Santiago is 2 hours.
Mountain Time (MDT) is behind Santiago (CLT).
MDT: UTC-6
CLT: UTC-4
Mountain Time is currently observing daylight saving time; Santiago is not.
When to schedule
Business-hours overlap: 9 AM–3 PM in Mountain Time (11 AM–5 PM in Santiago).
Both teams are in working hours during this window on weekdays.
Suggested time: 12:00 PM Mountain Time (2:00 PM Santiago).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
Chile
- New Year's DayThu, Jan 1
- Good FridayFri, Apr 3
- Holy SaturdaySat, Apr 4
- Labour DayFri, May 1
- Navy DayThu, May 21
- National Day of Indigenous PeoplesSun, Jun 21
- Saint Peter and Saint PaulMon, Jun 29
- Our Lady of Mount CarmelThu, Jul 16
- Assumption of MarySat, Aug 15
- National holidayFri, Sep 18
- Army DaySat, Sep 19
- Columbus DayMon, Oct 12
- Reformation DaySat, Oct 31
- All Saints DaySun, Nov 1
- Immaculate ConceptionTue, Dec 8
- Christmas DayFri, Dec 25
About these zones
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Santiago uses Chile Time (CLT, or CLST). To call Chile, dial +56.
Santiago is approximately 5,500 miles southeast of Mountain Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| MST | Santiago | Day |
|---|---|---|
| 12:00 am | 2:00 am | Same day |
| 1:00 am | 3:00 am | Same day |
| 2:00 am | 4:00 am | Same day |
| 3:00 am | 5:00 am | Same day |
| 4:00 am | 6:00 am | Same day |
| 5:00 am | 7:00 am | Same day |
| 6:00 am | 8:00 am | Same day |
| 7:00 am | 9:00 am | Same day |
| 8:00 am | 10:00 am | Same day |
| 9:00 am | 11:00 am | Same day |
| 10:00 am | 12:00 pm | Same day |
| 11:00 am | 1:00 pm | Same day |
| 12:00 pm | 2:00 pm | Same day |
| 1:00 pm | 3:00 pm | Same day |
| 2:00 pm | 4:00 pm | Same day |
| 3:00 pm | 5:00 pm | Same day |
| 4:00 pm | 6:00 pm | Same day |
| 5:00 pm | 7:00 pm | Same day |
| 6:00 pm | 8:00 pm | Same day |
| 7:00 pm | 9:00 pm | Same day |
| 8:00 pm | 10:00 pm | Same day |
| 9:00 pm | 11:00 pm | Same day |
| 10:00 pm | 12:00 am | +1 day |
| 11:00 pm | 1:00 am | +1 day |
Daylight saving time
Both zones observe daylight saving time, but they transition on different dates.
Mountain Time: next transition on Sunday, November 1, 2026.
Santiago: next transition on Sunday, September 6, 2026.
Mountain Time and Santiago are in opposite hemispheres, so their clocks change in opposite directions about six months apart — one springs forward while the other falls back. The offset between them therefore shifts twice a year and can swing by up to two hours across the seasons, more than a typical same-hemisphere pair. Recurring meetings will need re-checking after each transition.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:33 AM
- Sunset
- 8:28 PM
- Day length
- 14h 56m
- Sunrise
- 7:44 AM
- Sunset
- 5:42 PM
- Day length
- 9h 59m
Daylight overlap: 9h 59m — 5:44 AM–3:42 PM in Mountain Time (7:44 AM–5:42 PM in Santiago). Both locations are in daylight during this window.
Cities in these zones
Cities in Mountain Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Mountain Time
- BJC
- DEN
- OGD
- SLC
Airports in Chile Time
- SCL
Related conversions
Common conversions
- What is 9:00 am MST in Santiago?
- 9:00 am MST is 11:00 am Santiago.
- What is 12:00 pm MST in Santiago?
- 12:00 pm MST is 2:00 pm Santiago.
- What is 12:30 pm MST in Santiago?
- 12:30 pm MST is 2:30 pm Santiago.
- What is 2:00 pm MST in Santiago?
- 2:00 pm MST is 4:00 pm Santiago.
- What is 5:00 pm MST in Santiago?
- 5:00 pm MST is 7:00 pm Santiago.
- What is 11:30 pm MST in Santiago?
- 11:30 pm MST is 1:30 am Santiago, the next day.