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.
    

Judaism in Islam is considered as one of the most significant monotheistic religions, and many verses of Quran are dedicated to describing the fate of the followers of this religion. In different verses of the Holy Quran, when Allah wants to mention people of Moses, He calls them “Children of Israel” (Bani-Israel). The reason for which is that they were the generation of Prophet Jacob or Israel (PBUH), who at the time of Prophet Joseph (PBUH), migrated to Egypt and settled there for years [1].

After Pharaohs gained power in Egypt, they started violence against the immigrant generation of Israel by “slaughtering their sons and sparing their women” (28: 4).

Then after so many years, during which Bani-Israel were waiting for a deliverer, Moses was appointed to save them and deliver them from Egypt to the holy land: “O my people, enter the Holy Land which Allah has ordained for you, and do not turn your backs, or you will become losers’” (5: 21). They did not accept to enter the holy land as they were afraid of the people of that land. Therefore, they lost their opportunity and were wandering in the deserts for years. There was no promise that if children of Israel do not act according to God’s orders, they will still inherit the holy land. 

What happened to Jews after Moses?

“We dispersed them into communities around the earth: some of them were righteous, and some of them otherwise, and We tested them with good and bad [times] so that they may come back” (7: 168).
Like any other monotheistic religion that has good or bad followers, the followers of Judaism are either virtuous or sinful according to the above verse of the Holy Quran. 

The bad Jews, mainly known to be Zionists, are those who are committing great sins and have huge racist beliefs. Since they believe they are the higher race and others are somehow their properties. Zionism is not a religion, but a political branch that tries to gain power using any tools, even the religion of Jews. 

Judaism in Islam and Quran

The Holy Quran introduces all prophets as Muslims [2]. Quran strongly defends Jewish believers like the believers of other religions; “Indeed the faithful, the Jews, the Christians and the Sabaeans - those of them who have faith in Allah and the Last Day and act righteously—they shall have their reward from their Lord, and they will have no fear, nor will they grieve” (2: 62).

Quran confirms the book of Moses and says: “We sent down the Torah containing guidance and light” (5:44). And in another verse, it says: “Yet before it, the Book of Moses was a guide and mercy, and this is a Book in the Arabic language, which confirms it…” (46: 12).

Muslims Should Act Respectfully towards Jews

Although Quran confirms that all the prophets were from God and they had the same message, the problem, according to the Quran, is that the book of Moses was distorted by those ignorant and arrogant followers of him.

Accordingly, Islam was sent down to the followers of all prophets and the people of all nations and lands as a final and most complete religion, which was fundamentally the same as their religion. But all true believers and true followers of prophets should now be united in the way of worshipping One God and follow the book of Muhammad (PBUH), who has been mentioned in their books (7: 156-7).

God also warns Muslims that when they wish to convey His messages to the followers of other prophets, they should be respectful towards them: “Do not argue with the People of the Book except in a manner which is best, except such of them as are wrongdoers, and say, ‘We believe in what has been sent down to us and in what has been sent down to you; our God and your God is one [and the same], and to Him do we submit’” (29: 46).

As mentioned in the article on monotheism, from the Islamic point of view, the followers of other religions should realize the perfectness of Islam “despite the distorted image of Islam” in today’s world. They need to reach complete faith based on a firm understanding of Islam as the last and the complete way of life [3].

Respecting the Rabies 

Since Jews were waiting for the last prophet and when some of them found him rise from among Arabs and not from amongst themselves, they denied him, since they had this thought that Islam must belong to a specific land or specific people, and it cannot be a complete universal religion for all lands at all times.

God mentions the rabbis with so much respect in the Quran and expects them to enlighten their people in worshipping one God and not to be fighting against each other while they worship the same God: “We sent down the Torah containing guidance and light. The prophets, who had submitted, judged by it for the Jews, and so did the rabbis and the scribes, as they were charged to preserve the Book of Allah and were witnesses to it...” (5: 44).

Conclusion

Going through the story of Prophet Moses (PBUH) and explaining it in details in the Quran had two major reasons:

1. Since when Muhammad was assigned as a prophet, Jews annoyed him in every possible way, God kept sending revelations regarding their past actions and their behavior towards Prophet Moses from whom they had seen many miracles. 

2. The story of Jewish people and how they saw the miracles of their prophet and yet, they kept denying him, is repeatedly explained in the Quran, to be a lesson for Muslims. Muslims should remember that they had hard times, too, like the Jews, and they should not become arrogant because the last prophet was raised amongst them. Muslims should not make complaints against God’s orders, and by remembering the history of Jews, they should keep in mind that if they decline Allah’s commands, they will lose their opportunities since blessing is given to those who are God-wary: 

“If the people of the towns had been faithful and God-wary, We would have opened to them blessings from the heaven and the earth. But they denied; so We seized them because of what they used to earn” (7: 96).

References:

1. The Quran, Yousof (12), 93
2. The Quran, Al-Shourea (42), 13
3. jews in Islam