Method: Time#dst?

Defined in:

time.c

#isdst ⇒ Boolean #dst? ⇒ Boolean

Returns true if time occurs during Daylight Saving Time in its time zone.

# CST6CDT:
  Time.local(2000, 1, 1).zone    #=> "CST"
  Time.local(2000, 1, 1).isdst   #=> false
  Time.local(2000, 1, 1).dst?    #=> false
  Time.local(2000, 7, 1).zone    #=> "CDT"
  Time.local(2000, 7, 1).isdst   #=> true
  Time.local(2000, 7, 1).dst?    #=> true

# Asia/Tokyo:
  Time.local(2000, 1, 1).zone    #=> "JST"
  Time.local(2000, 1, 1).isdst   #=> false
  Time.local(2000, 1, 1).dst?    #=> false
  Time.local(2000, 7, 1).zone    #=> "JST"
  Time.local(2000, 7, 1).isdst   #=> false
  Time.local(2000, 7, 1).dst?    #=> false

Overloads:

• #isdst ⇒ Boolean

  Returns:

  • (Boolean)
• #dst? ⇒ Boolean

  Returns:

  • (Boolean)

# File 'time.c', line 4738

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 tobj->vtm.isdst ? Qtrue : Qfalse;
}