Is it permissible to suspend division among co-wives on the day of Eid?

We put this question to Shaykh Muhammad ibn Saalih al-‘Uthaymeen, may
Allaah preserve him, who answered as follows:

If
they both agree, then that is fine. But if the wife whose day it is
insists on it, then it is still her day. But I advise women to take
things easy with regard to this matter, because whoever makes things
easy (for others), Allaah will make things easy for him. The day of
Eid should be a day of coming together so that all the people may share
the joy of their Eid. And Allaah knows best.