Is it permissible for a woman to observe voluntary fasts without the permission of her husband, who objects to it, knowing that he is absent from the home throughout the fasting period and only returns at night?

A wife is not permitted to observe a voluntary fast while her husband is present except with his permission. However, a husband should not prevent her from observing supererogatory fasts unless doing so would cause harm. His statement, "There is no need for fasting other than Ramadan," is incorrect. Furthermore, his lack of zeal for his religion and his weak faith necessitate your adherence to the hijab even if he orders you to remove it, because "there is no obedience to a creature in disobedience to the Creator." You should advise him gently.