ANSWER:

Because this is imitating the kuffar which is forbidden for us to do. 

why is it not allowed to celebrate national day ? Isn’t it a worldly innovation ? So why are we not allowed to celebrate it ?

Other | December 4, 2017 3:09 pm
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Are also one of them who says iblis posses much knowledge than Rasulullah? naujubillah. And if not then your take on them who say like this
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I have come across some people using short forms for islamic greetings on whatsapp or email. For example they type Asak for Assalamualaikum. Is this allowed?