Atlantic Standard Time (AST)
The current time is Monday, Sep 20, 2021, 16:32:40 .
Offset from UTC: -0400
Atlantic Standard Time is 4 hours earlier than UTC, which is the international baseline that other time zones are compared to (also known as GMT).
In email headers and other technical contexts, this time zone is often expressed as -0400.
This time zone is not used during Daylight Savings Time. In places that do observe Daylight Savings, Atlantic Standard Time is only used during the cooler part of the year.
Similar time zones
The following time zones are equivalent to Atlantic Standard Time. Note that they may not share the same observance of (or schedule for) Daylight Savings Time.