Our Muslim brothers and sisters must know that there is no basis for saying that cutting the nails at night is haraam. It is permissible to cut one's nails at any time, whenever he wants, day or night.
Similarly, there is no basis for saying that one must say bismillah thrice and spit before cutting nails or throwing them away. It is also not correct to say that the nails must be buried so to prevent shayatan to use them. A hadeeth was narrated concerning that which is da’eef jiddan (very weak). It is permissible to throw them in the garbage or down the drain or to bury them. If a person fears that they may fall into the hands of those who practice sihr (witchcraft) then he should dispose of them in a place where they will not be able to get hold of them.
And Allaah knows best.
May Allah guide us all.