Is it permissible to give gifts to one's mother or siblings on days other than the innovated holidays, such as Mother's Day or birthdays, in order to avoid disputes, while still emphasizing that these holidays are innovations?

Celebrating unlawful occasions and offering gifts or congratulations therein is impermissible. It is considered a form of assistance and endorsement for them.

It is obligatory to denounce such acts and to refrain from offering gifts or congratulations on these occasions, whether before or after, as long as the occasion is the reason.

The questioner can convince his mother or relative that his abstention is out of fear of what is unlawful, and not due to stinginess or negligence, because these occasions are unlawful, and it is impermissible to celebrate them or request gifts for them.