Use this MST to SST time converter to compare US Mountain and American Samoa time instantly. SST is 4 hours behind MST, so 9:00 AM MST becomes 5:00 AM SST and 5:00 PM MST becomes 1:00 PM SST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
Use this MST to SST converter to compare US Mountain and American Samoa time, check the 4 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 1:00 PM MST / 9:00 AM SST.
Converting between Mountain Standard Time and Samoa Standard Time means accounting for a 4 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Mountain Standard Time (UTC -7) that you want to convert. Hit "Now" to load the current MST time instantly, or use "+1h" to step forward and compare.
The equivalent Samoa Standard Time (UTC -11) time appears immediately. Since SST is 4 hours behind of MST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the SST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
When someone in United States suggests 1:00 PM MST, that's 9:00 AM SST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night MST times can land on a different date in SST because of the 4 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the MST–SST gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in MST. Convert the event time to SST so you know exactly when to tune in — with a 4 hours difference, a morning event in United States falls during work hours in American Samoa.
Quick-reference conversion table covering every hour of the day at a glance.
Mountain Standard Time to Samoa Standard Time full day schedule
| Mountain Standard Time | Samoa Standard Time |
|---|---|
| 12:00 AM |
8:00 PM
(previous day)
|
| 1:00 AM |
9:00 PM
(previous day)
|
| 2:00 AM |
10:00 PM
(previous day)
|
| 3:00 AM |
11:00 PM
(previous day)
|
| 4:00 AM |
12:00 AM
|
| 5:00 AM |
1:00 AM
|
| 6:00 AM |
2:00 AM
|
| 7:00 AM |
3:00 AM
|
| 8:00 AM |
4:00 AM
|
| 9:00 AM |
5:00 AM
|
| 10:00 AM |
6:00 AM
|
| 11:00 AM |
7:00 AM
|
| 12:00 PM |
8:00 AM
|
| 1:00 PM |
9:00 AM
|
| 2:00 PM |
10:00 AM
|
| 3:00 PM |
11:00 AM
|
| 4:00 PM |
12:00 PM
|
| 5:00 PM |
1:00 PM
|
| 6:00 PM |
2:00 PM
|
| 7:00 PM |
3:00 PM
|
| 8:00 PM |
4:00 PM
|
| 9:00 PM |
5:00 PM
|
| 10:00 PM |
6:00 PM
|
| 11:00 PM |
7:00 PM
|
US Mountain — Denver, Salt Lake City, most of Arizona (Arizona notably observes no DST, so it's MST year-round while its neighbours flip). Business hours 9 AM – 5 PM MT.
Explore more MST conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.
Find the time difference from any major zone into Samoa Standard Time. Use these pages when scheduling with American Samoa from a different region.
