Dancing is a natural behavior in many cultures; a way of showing happiness or sometimes sadness. In a theory raised by me! the release of energy by moving our body is dancing. But in a theory raised by a scholar "dance refers to a rhythmic movement of the body, usually for entertainment" [1]. Now, let us take both of these definitions into consideration and see what kind of dancing in Islam is forbidden (Haram).

The General Ruling of Dancing in Islam

In the view of some Islamic scholars, it is not permissible for women to dance anywhere in any ceremony irrespective of whether it is a wedding or a birthday ceremony except for a woman's dancing for her husband.

In expanding the above ruling, it has been said that “there is no problem in dancing in itself. However, if dancing entails sexual excitation or committing a forbidden (Haram) act like listening to forbidden (Haram) music, or it is in the presence of non-mahram men, it is forbidden (Haram). And it does not make a difference as to the various types of music. Generally speaking, if dancing is done in a sexually exciting manner, and lead to the commission of a forbidden act, or involves a bad effect, or if it is happening in front of a non-Mahram it is forbidden (Haram)” [3].

If a woman dances for her husband or vice-versa, and the dancing is not accompanied by a forbidden (Haram) act, there is no problem in it [4].

Dancing in Mixed Parties

In mixed parties where men and women are sitting together, the dance of men or women in front of others is forbidden. Some think that it is OK if men dance in front of women. But in fact, it is forbidden (Haram) for a man to dance. Dance of women in front of men and any dancing which may entail a bad effect and arousal of sexual desires are forbidden (Haram). Playing music and listening to it is also unlawful (Haram) if it is done in a lahwi, enrapturing manner.

No matter if men or women who are dancing together or in front of others are of their unmarriageable kin (maḥrams) of the opposite sex. What is forbidden about dancing is general, i.e., regardless of whether it is done by a man, a woman, or in the presence of one’s marriageable kin (non-maḥram) or unmarriageable kin (maḥram) [5].

Women Dancing for Women in Small Parties, Friendly Gatherings, and Weddings

Dance of women for women is permitted (Halal) if it is not done in a sexually exciting manner and does not lead to the commission of a forbidden act, nor entails a bad effect. However, it is forbidden (Haram) to attend a dance party if it is considered as accepting the forbidden (Haram) act of others or leads to committing a forbidden (Haram) act. Otherwise, there is no harm in it. Dance of a woman for other women is forbidden if her husband does not allow her to do so. 

Some people think that the rulings of dancing do not apply to wedding parties as it is just one happy night. But there is no difference between a  wedding party and other occasions. Dancing with music is forbidden (Haram) [6].

In the case of wedding parties, the dance of women in front of women is not forbidden (Haram) under the conditions mentioned above.

Men Dancing for Men in Separate Parties or Weddings

As mentioned before, by obligatory caution, it is forbidden (Haram) for men to dance.

Dancing for fitness/ Aerobics and other sports with music

Here we discuss the point of releasing energy by moving the body. Is it forbidden (Haram)?

If the movements of the body do not meet the criteria of forbidden (Haram) dance, and if it is not accompanied by forbidden (Haram) music, there is no problem in dancing in private or in groups of women for fitness. However, we have to make sure that such dancing is not happening in front of CCTV cameras or filmed by people who may show it to non-mahrams.

Aerobics and other sports that are based on rhythmic music are permissible if the music is not forbidden (Haram). If music does not cause ecstasy, there is no objection to it. The duty-bound (mukallaf) himself should distinguish whether the music is lahwi or not [7].

Dance Teaching Centers

Establishing centers for teaching and promoting dancing goes against the objectives of the Islamic system and it is impermissible by obligatory caution [8].

References:

1. Sayyid Mujtaba Husseini, Questions and Answers by Students (Rules regarding Music), pg. 84
2. Ayatullah Makarem-Shirazi, jurisprudential expressions, http://portal.anhar.ir/node/409#gsc.tab=0
3. Sayyid Mas'ud Ma'sumi, Rules regarding Man-Woman Relationships, pg. 219
4. Tawzih al-Masail (with annotations by Imam Khomeini), vol.2, pg. 970
5. Dancing
6. dance in Islam
7. Dance
8. Dance infront of non Mahrams

In Islam, there are some ceremonies and occasions which are held all around the world among Muslims. They all have religious backgrounds and are mostly referred to in the holy Quran. Muslim nations have been commemorating them in the course of history. Here we are going to have a glance at the most significant Islamic occasions based on the Lunar Calendar.

6 Major  Islamic Occasions 

1.10th of Muharram: Martyrdom of Imam Hussain (AS)

The month of Muharram is the first month of the year in the lunar calendar. On the tenth day of this month, Hussain Ibn Ali (AS), the grandson of Prophet Muhammad (PBUH&HP), and his companions were brutally martyred, and their women and children were taken captive by the caliph of the time, Yazid ibn. Muawyah. Their story has been the source of inspiration for many new converts. 

2. 20th of Safar: The Day of Arbaeen

Arbaeen is the Arabic word for forty, and it marks the 20th of Safar, the fortieth day after Imam Hussain's (AS) martyrdom on the day of Ashura, who was martyred in the event of Karbala along with his companions in the cruelest and most inhumane way possible. 

According to some historical accounts [2], some of the members of Imam Hussain's (AS) family after being released from the bondage of Yazid's forces returned to Karbala from Sham (today's Damascus) to visit Imam Hussain's (AS) grave. Also, some believe that Imam Hussain's (AS) head, which was taken to Sham by Yazid's army was brought back to Karbala on this day and buried with his body [3] & [4]. 

Every year, a few days before this day, a vast number of people from all over the world, Muslims or even non-Muslims, gather in Iraq to take part in a symbolic walk, to revive the teachings of Imam Hussain (AS) and commemorate his sacrifice in the way of Allah and humanity. 

3. 17th of Rabi al-Avval: Prophet Muhammad's (PBUH&HP) Birthday

There is a disagreement concerning the exact date of Prophet Muhammad's (PBUH&HP) birthday. Some believe it occurred on the 12th of Rabi al-Avval, while others consider it to be on the 17th of Rabi al-Avval, the third month in the Islamic calendar. Prophet Muhammad (PBUH&HP) was born in Mecca. All Muslims around the world celebrate his birthday and regard it as one of the important Islamic occasions. On this day, Muslims feed the needy, pray and recite the Quran, commemorate Prophet Muhammad (PBUH&HP), and his challenges to deliver the messages of Allah to human beings.

4. 1st of Shawwal: Eid al-Fitr

The first day of the month of Shawwal, the tenth month of the Islamic calendar, is called Eid al-Fitr. After fasting for one month, during the month of Ramadan, remembering, worshipping Allah and trying to do fewer sins beside not eating and drinking from before the Call for Fajr prayer to after the Call for Magrib prayer, Muslims celebrate the first day of the month of Shawwal, for their success in submitting to Allah's command. They perform the Eid prayer first; then, they hold a feast inviting their loved ones, wear their best clothes, and visit their friends and family. The culture of feasting might be different in different Islamic communities, but one thing is for sure; no one is allowed to fast on this exceptional day. Allah also obliges Muslims to share their blessings and happiness with the needy with the money they donate to them. 

5. 10th of Dhu'l-Hijjah: Eid al-Adha

Eid al-Adha is one of the most significant Islamic occasions. Some of the most important events of this Abrahamic religion happened on this day. On this Eid, similar to Eid al-Fitr, Muslims are not allowed to fast. The first is the sacrifice of Ishmael by his father, Abraham, for the sake of Allah. When Abraham and his son both surrendered, and he was ready to behead his son, Allah sent a ram and asked Abraham to kill that instead.

"So when they had both surrendered [to Allah's will], and he had laid him down on his forehead, We called out to him, 'O Abraham! You have indeed fulfilled your vision! Thus indeed do We reward the virtuous! This was indeed a manifest test. Then We ransomed him with a great sacrifice, and left for him a good name in posterity." (37: 103-108)

This day is also the last day of Hajj rituals, in which Muslims shall sacrifice an animal to feed the needy Muslims. On this day, those who attended Hajj have performed all their Hajj rituals, and with the great assistance of Allah, all their sins are wiped away, and Allah accepts their good deeds and repentance.

Many Muslims celebrate this day. They sacrifice an animal to feed the needy, even if they have not attended Hajj. If they do not have enough money to buy a sheep, they do other things and feed the destitute in different ways. This sacrifice is an expression of generosity and obedience to the commands of Allah. This Eid also reminds humankind of the characteristics, such as envy, rage, dishonesty, etc., they have to symbolically sacrifice in themselves to become the better version of themselves and be worthy of being Allah's best creation. 

5. 18th of Dhu'l-Hijjah: Eid al-Ghadir

This Islamic occasion was a day in the last Hajj pilgrimage (Hajjat al-Vida'a) of Prophet Muhammad (PBUH&HP). When he was going back to Medina with all his companions and other pilgrims, he gathered everyone around a place called Ghadir and announced these words in which he appointed Imam Ali b. Abi Talib (AS) as his caliph and the Imam after himself following a direct order from Allah [i]:

"Whomsoever, I am his leader (Mawla), Ali (AS) is also his leader (Mawla). O' Allah! Love those who love him (Ali (AS)) and oppose those who oppose him" [1]

This is another important day in the Muslim calendar. On this day, Muslims can fast and again feed the needy, as an essential part of Islamic culture. 

These are the most significant and most celebrated Islamic occasions. As one can see, feeding others and praying to Allah are the essential things a Muslim should do to celebrate a feast, which reveals the importance of caring for others in Islam that results from the devotion to Allah.  

Notes: 
[i] Verse 67th of Surah al-Maedah known as Al-Tabligh Verse, and the third verse of the same chapter known as Al-Ikmal Verse. 

References:

1.  Ibn Athīr, Usd al-ghāba, vol. 3, p. 605; Kulaynī, al-Kāfī, vol. 1, p. 295; Balādhurī, Ansāb al-ashrāf, vol. 2, p. 110-111;
2.  Ibn Tawus, 'Ali b. Musa, Al-Luhuf 'ala qatla l-tufuf, Uswi, Qom, 1414 AH.
3.  Al-Biruni, Abu Rayhan, The Remaining Signs of Past Centuries, p.331.
4. Qazi al-Tabataii, Muhammad Ali, A Research on the first Arba'een of the Leader of Martyrs (Imam Hussain (AS)), vol.3, p.304.