Gets the standard offset for the specified instant _in this zone.
!(p)
This provides access to historic information on how the standard offset
has changed over time.
The standard offset is the offset before any daylight saving time is applied.
This is typically the offset applicable during winter.
@param instant the instant to find the offset information for, not null, but null
may be ignored if the rules have a single offset for all instants
@return the standard offset, not null
Gets the standard offset for the specified instant _in this zone. !(p) This provides access to historic information on how the standard offset has changed over time. The standard offset is the offset before any daylight saving time is applied. This is typically the offset applicable during winter.
@param instant the instant to find the offset information for, not null, but null may be ignored if the rules have a single offset for all instants @return the standard offset, not null