Is it permissible for a woman who has been irrevocably divorced and is observing her 'iddah to attend celebrations?

An 'iddah observer (a woman in her waiting period) may go out during the day to attend to her needs, whether she is divorced or a widow, because nighttime is a cause for mischief, unlike the daytime. It is permissible for a woman observing 'iddah after an irrevocable divorce or due to widowhood to go out for a wedding, but she must not adorn herself and must not spend the night anywhere but in her home.