Yes, is good to do spell on some good day, phase and time that will help you. It you want at night time then choose Disseminating Moon, it is from three to seven days after full moon. Every time has its own importance for different spells.
It really depends on the spell that your trying to do. Books and other sources sometimes claim that one would have to wait for a certain moon phase or time of day to do the spell or ritual that your wanting to do. If your reading about a spell that requires this and you feel that this is essential for the spell to work then you should go by the book or source on this.
My suggestion is to do a little bit of research on this subject and find one that suites your needs if it is your will to do one.
I'm not giving away any spoilers here, but the mechanics behind a successful curse can't be limited to a certain moon phase or time frame.