perldoc -f localtime: What is (localtime)[8] ??

perldoc -f localtime  returns 
#  0       1        2     3         4         5       6        7        8
 ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =localtime(time);


What is $isdst???

Thanks,

Frank

• perldoc -f localtime: What is (localtime)[8] ?? by Frank Newland
• RE: perldoc -f localtime: What is (localtime)[8] ?? by Wagner-David