MST to CLT Time Converter

Common Times Converted

MST on the left, CLT on the right.

MST to CLT: Full 24-Hour Conversion Table

Shaded rows are working hours; the darker shade marks the hours when both zones are at work.

What MST and CLT Actually Are

MST — Mountain Standard Time

Denver, Salt Lake City, Calgary — and Phoenix year-round. Standing at UTC-7:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to MST. Arizona stays on MST all year, so Phoenix and Denver are an hour apart for eight months and identical for four.

Arizona has stayed on MST year-round since 1968 — the Navajo Nation within it does observe daylight saving, making the state a patchwork.

CLT — Chile Standard Time

Santiago, Valparaíso, Concepción. Standing at UTC-4:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Saturday, April 3, 2027, to -04. Chile still changes its clocks, moving to CLST (UTC-3) for the southern summer.

Chile is one of very few countries still moving its clocks, and the Magallanes region in the far south stays on UTC-3 permanently while the rest of the country switches.

What This Means in Practice

Both sides change clocks, on different dates

Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.

Major Cities in Each Zone

Cities on MST

Cities on CLT