He vowed to take his mother for ‘Umrah on the day of Eid; can he take her for ‘umrah in Ramadan?
Question

                He vowed to take his mother for ‘Umrah on the day of Eid every year. Is it permissible to him to take her for ‘Umrah in Ramadan instead of on the day of Eid without offering expiation? If she does not want that, what should he do?.
Praise be to Allah.
    If you took your mother for ‘Umrah during Ramadan, there is 
    nothing wrong with that, because you have done something that is better than 
    the time mentioned in your vow. This is like if a person vowed to pray in 
    al-Masjid al-Aqsa then he prayed in al-Masjid al-Haraam or al-Masjid 
    al-Nabawi, because he offered the prayer in a better place. In a saheeh 
    hadeeth it refers to that scenario and says that there is nothing wrong with 
    it. It was narrated from Jaabir (may Allah be pleased with him) that a man 
    said on the day of the conquest of Makkah: O Messenger of Allah, I vowed 
    that if Allah granted you victory in Makkah, I would pray in Bayt al-Maqdis 
    (Jerusalem). He said: “Pray here.” He asked him, and he said: “Pray here.” 
    He asked him again and he said: “Then it is up to you.” Narrated by Ahmad 
    and Abu Dawood; classed as saheeh by al-Haakim. 

    But if your mother refuses to do ‘Umrah, there is no 
    obligation on him either, because he has done what he had to do and the 
    refusal came from someone else. 

    And Allah is the source of strength. May Allah send blessings 
    and peace upon our Prophet Muhammad and his family and Companions. End 
    quote. 

    Standing Committee for Academic Research and Issuing Fatwas 

    Shaykh ‘Abd al-‘Azeez ibn Baaz, Shaykh ‘Abd al-Razzaaq ‘Afeefi, Shaykh ‘Abd-Allaah ibn Ghadyaan