Eid
Question : Is it obligatory to pray Eid Prayer?
Answer : Eid prayer is not obligatory in our time but recommended.
Eid prayers
Question : Is it allowed for an imam of congregational prayers to offer Eid prayer in more than one place or in the same place more than once?
Answer : It is permissible to do so with the hope that it is desired by Almighty High.
Eid Ul Azha
Question : What is our position in respect to the slaughtering of the animal on Eid-ul-Adha? Is it obligatory?
Answer : It is recommended to undertake the sacrifice of Eid-ul-Adha in the Islamic faith as it is part of the Sunnah of the Prophet (peace be upon him and his holy progeny).
Eid-ul-Adha - Ritual Sacrifice of Animal
Question : Is it recommended for me to offer the sacrifice of animal on the occasion of Eid-ul-Adha? I can afford to offer a sacrifice but would prefer to give charity to people in need instead.
Answer : Sacrificing an animal such as a camel or cow is recommended, and one can do so on behalf of anybody deceased or living. Giving charity to needy people instead does not replace this recommended Sunnah of the Prophet (peace be upon him and his holy progeny), but one can undertake the sacrifice and give the meat to the needy people.
Eid
Question : Is it permissible to sacrifice the animal on the first day of Eid ul-Adhha before the prayer of Eid ul-Adhha, and then pray.
Answer : It is permissible to do so but it is better to sacrifice the animal after the Eid prayer if it was offered.
Eid
Question : If the horn of the sacrificial animal is broken, can we sacrifice it on Eid al-Adha for the pleasure of God?
Answer : It is sufficient to use an animal with broken horn as a sacrifice of Eid al-Adha, although choosing one with a non-broken horn is better.
Eid
Question : What conditions are there for the sacrificial animal which must be slaughtered during Eid al-Adha? If the animal is damaged or injured, will it suffice?
Answer : The sacrifice of a damaged animal will not suffice for Eid-ul-Adha.
Nowruz
Question :

I want to know the Islamic background of Eid-e-Nowruz. Is it an Islamic festival?

Answer :

No, it is not. Nowruz is a national festival for Persians and other nations like Turks and Kurds. The said nations are still celebrating it as a festival connected to their cultures even after they embraced Islam.

The Day of Nowruz
Question :

Is there any truth in what has been reported of the lofty position of the Day of Nowruz and the great reward that could be reaped for engaging in acts of worship on that day? Is it permissible to engage in these acts of worship as really desired in Islam?

Answer :

Some narrations are reported that state some recommended acts on this day but their chains of narrators are weak, so one cannot depend on them to derive the said recommendations. At the same time, it is difficult to determine the day from the narration, so it could correspond to the day of Nowruz known in our times or not.

Eid
Question : Can we offer the prayer of Eid-ul-Ghadeer in congregation?
Answer : No, it is not offered in congregational.
Eid
Question : Is it permissible to celebrate "April Fools’ Day"?
Answer : It is impermissible to lie. It is permissible to joke with friends on this particular day or any other days provided that it is not associated with other prohibitions like causing harm to others or humiliating others or the like.
New Year
Question :

In non-Muslim countries they celebrate New Year’s Eve, Is it allowed to celebrate it like the others?

Answer :

Such actions are permissible unless they result in propagation of misguidance or it strengthens it, in which case it becomes prohibited.

Birthdays
Question :

Is it permissible to greet a person on his birthday? And is it permissible to celebrate a person's birthday by cutting cakes and organizing parties?

Answer :

It is permissible, but it is best to avoid non-Islamic celebrations.

Celebrating Birthdays
Question :

May a person celebrate his or somebody else's birthday?

Answer :

Yes, it is permissible, provided that this does not involve another prohibition.

Celebrating Christmas
Question :

Can we celebrate Christmas and New Year? What about giving gifts to your Christian colleagues/workers/teachers on the occasion of Christmas, and wishing ‘Happy New Year’ to Muslims and Christians?

Answer :

Prophet Mohammed (peace be upon him and his progeny) is the final prophet, and his message is the last divine message. Practices of other religions are not recognized by the Islamic Sharia. However, Islam emphasizes on cohabitation with followers of other religions. It is permissible to do what makes such co-existence without considering such acts a part of the Sharia, as long as it does not involve any forbidden act.