change time mode from BST to GMT

UNIX HP-UX
1

I want to know how to change the time zone from BST to GMT avoid the daylight savings in hp-ux

2

1) if the environment variable TZ is present, it takes the
precedence.
2) if TZ is not present, then the value contained in
/etc/default/tz is used for default.
3) if /etc/default/tz is not set, then the default value is
equivalent to EST5EDT (Eastern Standard Time) of US.

3

/etc/TIMEZONE

Anyway vbe is correct. TZ=GMT0. There is the tztab file which actually defines whether you have daylight savings time in effect or not. Try the manpage.

4

Thanks time zone changed