Thanks You !. 

Kindly help me 

Local time means : user location time ( users might be from various places right , will it take location time ? )   or instance time ?   or   User profile Timezone time

var gdt = new GlideDateTime();
var gt = gdt.getTime();
gs.info("DayOf Test:" + gt.getHourOfDayLocalTime()+"-----"+gt);

Output : DayOf Test:13-----1970-01-01 21:06:47