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Why dear ? Although everyday is fathers day ,mother's day ,women's day , children's day , even god's day like shivratri , janmasthami , still we celebrate these particular days to make their presence great to us . Then why not valentines day to tell our sweethearts that you are my sonia ?
Of course , it must not be like pati, patni aur Woh to every girl you like ,to tell happy valentines day ,otherwise remember , day after is that slap day :))))