• IRDT Time to AST Time Converter

    IRST = UTC + 03:30

    09:04:59

    Friday, December 12, 2025

    AST = UTC - 04:00

    01:34:59

    Friday, December 12, 2025

    IRST(Iran Standard Time) and AST(Atlantic Standard Time) Mapping Table
    Iran Standard Time(IRST)Atlantic Standard Time(AST)
    00:0016:30-1 day
    01:0017:30-1 day
    02:0018:30-1 day
    03:0019:30-1 day
    04:0020:30-1 day
    05:0021:30-1 day
    06:0022:30-1 day
    07:0023:30-1 day
    08:0000:30
    09:0001:30
    10:0002:30
    11:0003:30
    12:0004:30
    13:0005:30
    14:0006:30
    15:0007:30
    16:0008:30
    17:0009:30
    18:0010:30
    19:0011:30
    20:0012:30
    21:0013:30
    22:0014:30
    23:0015:30

    IRST(Iran Standard Time)

    Iran Standard Time(IRST) is 03:30 hours ahead of Coordinated Universal(UTC) Time.This timezone is used during standard time in: AsiaIran Standard Time is a half-hour time zone. Its local time differs by 30 minutes instead of the normal whole hour.

    Typical City of IRST (Iran Standard Time)

    Iran - Tehran (Winter)

    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)