Changing the Time Zone

/etc/sysconfig/clock

The /etc/sysconfig/clock file controls the interpretation of values read from the system hardware clock.

The correct values are:

UTC=, where is one of the following boolean values: true or yes — The hardware clock is set to Universal Time. false or no — The hardware clock is set to local time.

ARC=, where is the following: false or no — This value indicates that the normal UNIX epoch is in use. Other values are used by systems not supported by Red Hat Enterprise Linux.

SRM=, where is the following: false or no — This value indicates that the normal UNIX epoch is in use. Other values are used by systems not supported by Red Hat Enterprise Linux.

ZONE= — The time zone file under /usr/share/zoneinfo that /etc/localtime is a copy of. The file contains information such as:

ZONE="America/New York"

Note that the ZONE parameter is read by the Time and Date Properties Tool (system-config-date), and manually editing it does not change the system timezone. Earlier releases of Red Hat Enterprise Linux used the following values (which are deprecated):

CLOCKMODE=, where is one of the following: GMT — The clock is set to Universal Time (Greenwich Mean Time). ARC — The ARC console's 42-year time offset is in effect (for Alpha-based systems only).

Create a symbolic link between /etc/localtime and your time zone file so that the instance finds the time zone file when it references local time information.

[ec2-user ~]$ sudo ln -sf /usr/share/zoneinfo/America/New_York /etc/localtime