Eid ul-Fitr is a three day celebration and is sometimes also known as the "Smaller Eid” as compared to the Eid ul-Adha that lasts four days and is called the "Greater Eid" 
Muslims are commanded by the Qur'an to complete their fast on the last day of Ramadan and then recite the Takbir all throughout the period of Eid

Common greetings during this holiday are the Arabic greeting ‘Īd mubārak ("Blessed Eid") or ‘Īd sa‘īd ("Happy Eid"). In addition, many countries have their own greetings based on local language and traditions.

Typically, Muslims wake up early in the morning and have a small breakfast (as a sign of not being on a fast on that day) of preferably the date fruit, before attending a special Eid prayer (salah) that is performed in congregation at mosques or open areas like fields, squares etc. Muslims are encouraged to dress in their best clothes (new if possible) to attend the Eid prayer. No adman or iqama is to be pronounced for this Eid prayer, and it consists of only two raka'ahs. The Eid prayer is followed by the khutbah (sermon) and then a supplication (dua') asking for forgiveness, mercy and help for all living beings across the world. The khutbah also instructs Muslims as to the performance of rituals of Eid, such as the zakat. It is then customary to embrace the persons sitting on either side of oneself, whilst greeting them. After the prayers, people also visit their relatives, friends and acquaintances and some people also pay visits to the graveyards

2.
Eid al-Adha “Festival of Sacrifice" or "Greater Bairam" is a religious festival celebrated by Muslims (including the Druze) worldwide to commemorate the willingness of Ibrahim to sacrifice his son Ishmael as an act of obedience to God. However, God provided a ram in place once Ibrahim demonstrated his willingness to follow God's commands.

Eid al-Adha is the latter of two Eid festivals celebrated by Muslims, whose basis comes from the Quran. (Muslims in Iran celebrate a third, non-denominational Eid.) Like Eid al-Fitr, Eid al-Adha begins with a short prayer followed by a sermon (khuṭba).

Eid al-Adha annually falls on the 10th day of the month of Dhul Hijja of the lunar Islamic calendar. The festivities last for three days or more depending on the country. Eid al-Adha occurs the day after the pilgrims conducting Hajj, the annual pilgrimage to Mecca in Saudi Arabia by Muslims worldwide, descend from Mount Arafat. It happens to be approximately 70 days after the end of the month of Ramadan

Men, women, and children are expected to dress in their finest clothing to perform Eid prayer in a large congregation in open area (not in a mosque). Muslims who can afford to do so sacrifice their best domestic animals (usually sheep, but also camels, cows and goats) as a symbol of Ibrahim's sacrifice. The sacrificed animals, called uḍiyyah , have to meet certain age and quality standards or else the animal is considered an unacceptable sacrifice. Generally, these must be at least a year old.

The regular charitable practices of the Muslim community are demonstrated during Eid al-Adha by the concerted effort to see that no impoverished person is left without sacrificial food during these days.

Distributing meat among people is considered an essential part of the festival during this period, as well as chanting Takbir out loud before the Eid prayer on the first day and after prayers through out the four days of Eid. In some countries families that do not own livestock can make a contribution to a charity that will provide meat to those who are in need.

3
Mawlid (Eid Milad an Nabi) (Turkish: Mevlid) is a term used to refer to the observance of the birthday of the Islamic prophet Muhammad which occurs in Rabi' al-awwal, the third month in the Islamic calendar. The origins of the observance can be traced back to the Fatimid dynasty in eleventh century Egypt, four centuries after the death of Muhammad as a ruling class festival.

The term Mawlid is also used in some parts of the world, such as Egypt, as a generic term for the birthday celebrations of other historical religious figures such as Sufi saints

4.
Mid-Sha'ban is the 15th day of the Muslim month of Sha'ban. Laylatul Bara'ah is the night preceding the 15th day of Shaban.

5.
Laylat al-Qadr, basically the Night of Decree or Night of Measures, is the anniversary of two very important dates in Islam that occurred in the month of Ramadan. It is the anniversary of the night Muslims believe the first verses of the Qur'an were revealed to the Islamic prophet Muhammad.

Muslims believe also that this night is when their fate in the following year is decided and hence pray for God all night long and pray for mercy and salvation. This practice is called Ehyaa (basically meaning "revival").

6.
The Day of Ashura is on the 10th day of Muharram in the Islamic calendar and marks the climax of the Remembrance of Muharram.

It is commemorated by the Muslims as a day of mourning for the martyrdom of Husayn ibn Ali, the grandson of the Islamic Prophet Muhammad at the Battle of Karbala on 10 Muharram in the year 61 AH (October 10, 680 AD). Sunni Muslims believe that Moses fasted on that day to express gratitude to God for liberation of Israelites from Egypt. According to Sunni Muslim tradition, Muhammad fasted on this day and asked other people to fast.

In some countries and regions such as Iran, Iraq, Pakistan, Lebanon, Bahrain and Jamaica, Commemoration of Husayn ibn Ali has become a national holiday and most ethnic and religious communities participate in it.

For Shi'as, commemoration of Ashura is not a festival, but rather a sad event, while Sunni Muslims view it as a victory God (Allah) has given to his prophet, Musa. This victory is the very reason, as Sunni Muslims believe, Muhammad mentioned when recommending fasting on this day. For Shi'as, it is a period of intense grief and mourning. Mourners, congregate at a Mosque for sorrowful, poetic recitations such as marsiya, noha, latmiya and soaz performed in memory of the martyrdom of Hussein, lamenting and grieving to the tune of beating drums and chants of "Ya Hussain." Also Ulamas give sermons with themes of Hussein's personality and position in Islam, and the history of his uprising. The Sheikh of the mosque retells the Battle of Karbala to allow the listeners to relive the pain and sorrow endured by Hussein and his family. In Arab countries like Iraq and Lebanon they read Maqtal Al-Husayn. In some places, such as Iran, Iraq and the Arab states of the Persian Gulf, Ta'zieh, passion plays, are also performed reenacting the Battle of Karbala and the suffering and martyrdom of Hussein at the hands of Yazid.

Tabuiks being lowered in to the sea in Pariaman, Indonesia, by Shia Muslims.For the duration of the remembrance, it is customary for mosques and some people to provide free meals (Niazz) on certain nights of the month to all people. Many people donate food and Middle Eastern sweets to the mosque. These meals are viewed as being special and holy, as they have been consecrated in the name of Husayn, and thus partaking of them is considered an act of communion with God, Hussain, and humanity.

Many participants congregate together in public processions for ceremonial chest beating (matham/latmiya) as a display of their devotion to Husayn, in remembrance of his suffering and to preach that oppression will not last in the face of truth and justice. Others pay tribute to the time period by holding a Majilis. Surahs from the Quran and Maqtal Al-Husayn are read.

Today in Indonesia, the event is known as Tabuik (Minangkabau language) or Tabut/Tabot (Indonesian). Tabuik is the local manifestation of the Shi'a Muslim Remembrance of Muharram among the Minangkabau people in the coastal regions of West Sumatra, particularly in the city of Pariaman. The festival includes reenactments of the Battle of Karbala, and the playing of tassa and dhol drums.

7.
In Islamic tradition, the Night Journey, Isra and Mi'raj, are the two parts of a journey that the Islamic prophet Muhammad took in one night, around the year 621. Many Muslims consider it a physical journey but some scholars consider it a dream or vision. A brief sketch of the story is in verses 1 and 60 of one of the Qur'an chapters, and other details were filled in from the supplemental writings, the hadith.

The event is celebrated each year via a festival for families, the Lailat al Miraj, one of the most important events in the Islamic calendar. Muslims bring their children to the mosques, where the children are told the story, pray with the adults, and then afterwards food and treats are served.