• AST Time to MST Time Converter

    AST = UTC - 04:00

    19:51:32

    Thursday, December 11, 2025

    MST = UTC - 07:00

    16:51:32

    Thursday, December 11, 2025

    AST(Atlantic Standard Time) and MST(Mountain Standard Time) Mapping Table
    Atlantic Standard Time(AST)Mountain Standard Time(MST)
    00:0021:00-1 day
    01:0022:00-1 day
    02:0023:00-1 day
    03:0000:00
    04:0001:00
    05:0002:00
    06:0003:00
    07:0004:00
    08:0005:00
    09:0006:00
    10:0007:00
    11:0008:00
    12:0009:00
    13:0010:00
    14:0011:00
    15:0012:00
    16:0013:00
    17:0014:00
    18:0015:00
    19:0016:00
    20:0017:00
    21:0018:00
    22:0019:00
    23:0020:00

    AST(Atlantic Standard Time)

    Atlantic Standard Time(AST) is 04:00 hours behind Coordinated Universal(UTC) Time.This timezone is used during standard time in: North America

    Typical City of AST (Atlantic Standard Time)

    Canada - Halifax (Winter)
    Canada - Blanc-Sablon (All Year)
    Bermuda - Hamilton (Winter)
    Dominican Republic - Santo Domingo (All Year)
    Sint Maarten - Philipsburg (All Year)

    MST(Mountain Standard Time)

    Mountain Standard Time(MST) is 07:00 hours behind Coordinated Universal(UTC) Time.This timezone is used during standard time in: North America

    Typical City of MST (Mountain Standard Time)

    Canada - Edmonton (Winter)
    USA - Phoenix (All Year)