In the calmness of night, just sit down, try to pen something special for your mother. You will either spend the whole night shedding tears or end up cursing yourself for the infinite occasions where you have intentionally or unintentionally hurt her. From bringing you to this world to caring like none, protecting you, overlooking all shortcomings, to ignoring all your flaws, she has always stood by your side, no matter how thorny a situation is.