Such an interesting cartoon ..... its a fact indeed. During Ramadan each & every one knows the Magrib timing with its correct minutes & seconds......
(http://1.bp.blogspot.com/-N-32U1K4-As/UA_C1mUpBCI/AAAAAAAAC5s/BOEKUHLrTAM/s1600/cartoon.jpg)
But it should be our practice for the whole year, for the rest 11 months indeed.