AST to MDT Converter

MDT is 2h 0m behind AST. When it's 12:00 PM AST, it's 10:00 AM MDT.

From

AST · UTC-4

12:09:47AM

Atlantic Standard Time

e.g. Halifax, Puerto Rico

To

MDT · UTC-6

10:09:47PM

Mountain Daylight Time

e.g. Denver

Open in World ClockMDT → AST
9:00 AM AST=7:00 AM MDT
12:00 PM AST=10:00 AM MDT
5:00 PM AST=3:00 PM MDT

Hourly conversion (AST → MDT)

ASTMDT
12:00 AM10:00 PM(−1 day)
1:00 AM11:00 PM(−1 day)
2:00 AM12:00 AM
3:00 AM1:00 AM
4:00 AM2:00 AM
5:00 AM3:00 AM
6:00 AM4:00 AM
7:00 AM5:00 AM
8:00 AM6:00 AM
9:00 AM7:00 AM
10:00 AM8:00 AM
11:00 AM9:00 AM
12:00 PM10:00 AM
1:00 PM11:00 AM
2:00 PM12:00 PM
3:00 PM1:00 PM
4:00 PM2:00 PM
5:00 PM3:00 PM
6:00 PM4:00 PM
7:00 PM5:00 PM
8:00 PM6:00 PM
9:00 PM7:00 PM
10:00 PM8:00 PM
11:00 PM9:00 PM

Shaded rows are within standard working hours (8am–6pm) on both sides.

More AST conversions

Frequently asked questions

What is the time difference between AST and MDT?
MDT is 2h 0m behind AST. AST is UTC-4 and MDT is UTC-6.
What is 12:00 PM AST in MDT?
12:00 PM AST is 10:00 AM MDT.
Does AST change for daylight saving time?
AST is a fixed offset of UTC-4 and does not itself change for daylight saving time.