Question

shortest night in southern hemisphere happens on 
a) 21 december
b) 22 december

Answer 1

b) december 21 hope so.. but this varies btwn 21th and 23rd of December..

Answer 2

 Dec 21 is where day and night are in equal proportions: what i mean is the night and day are neither shorter nor longer than on any other date in the calendar. 
 i thnk ths answr help u