NO it is not a HAPPY moment. It is a terrifying moment. Happiness may or may not come later. You'll be happy if you made the right choice which you will never know in the present. Letting go can also be the most devastating thing.
Today will Never come again. Be a blessing. Be a friend. Encourage someone. Take time to care. Let your words heal, and not wound. Stay positive, and make a difference! I try to do these things everyday.