Specifies when daylight saving time (DST) is observed. By default, the
DST period is defined as the second Sunday in March to the first Sunday in
November. (This is the period during which DST is observed in the United
The variables begin_month, begin_week, and begin_day define the
month, week, and day, respectively, when DST begins.
The variables end_month, end_week, and end_day define when DST ends.
Months are 1 (January) through 12 (December); weeks are 1 through 4;
days are 1
(Sunday) through 7 (Saturday).
You use negative numbers to specify the
weeks, where -1 is the last week of the month, -2 is the second to last
week, and so on.
For example, the default setting is
3 -3 1 11 -4 1 (the
second Sunday in March
to the first Sunday in November).
For information on additional ways to adjust the time stamp for daylight
savings time, see
"DST," "DST_Begin_Date," and "DST_End_Date."
3 -3 1 11 -4 1 (the second Sunday in March to the first
Sunday in November)
begin_month, begin_week, begin_day, end_month, end_week,