FUJITSU SPARC ENTERPRISE M4000 - Manual (Page 259)

settimezone(8)
System Administration 289
-p offset Specifies the offset of Daylight Saving Time and Greenwich
mean time (GMT). You can specify offset in the following format.
In case omitted, it is 1 hour before the specified time.
GMT {+|–}hh[:mm[:ss]]
GMT Greenwich mean time
{+|–} Specifies "–" to set the standard time to the
time which is ahead of GMT. (To adjust to
the local time east to Greenwich, the offset is
a negative value.)Specifies "+" to set the
standard time to the time which is behind
the GMT. (To adjust to the local tome west
to Greenwich, the offset is a positive value.)
hh[:mm[:ss]] Specifies the offset time. hh is 00–23, mm is
00
–59, ss is 00–59.
-s timezone Specifies the time zone. One of the time zone displayed by the
-a
option can be specified for timezone.