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instance method
Time#isdst
dst? -> true or false
time.c
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static VALUE
time_isdst(VALUE time)
{
struct time_object *tobj;
GetTimeval(time, tobj);
MAKE_TM(time, tobj);
if (tobj->vtm.isdst == VTM_ISDST_INITVAL) {
rb_raise(rb_eRuntimeError, "isdst is not set yet");
}
return RBOOL(tobj->vtm.isdst);
}
Returns true if self is in daylight saving time, false otherwise:
Example
t = Time.local(2000, 1, 1) # => 2000-01-01 00:00:00 -0600 t.zone # => "Central Standard Time" t.dst? # => false t = Time.local(2000, 7, 1) # => 2000-07-01 00:00:00 -0500 t.zone # => "Central Daylight Time" t.dst? # => true
Time#isdst is an alias for Time#dst?.