Hameedeh

Jumada al-Akhira 20 (also known as Jamadi al-Thani 20) is the birth anniversary of Lady Fatima Zahra AS, the daughter of Prophet Muhammad SA, the wife of Imam Ali AS, and mother/grandmother of other Imams, AS. Congratulations and best wishes to everyone. (This date is according to the crescent moon sighting in the US and Canada. Refer to the Jamadi al-Thani 20 date in your own country, which could be one day sooner or one day later, wherever you reside.)
https://www.al-islam.org/fourteen-luminaries-islam-ahmad-ahmadi-birjandi/third-infallible-hadhrat-fatimah-al-zahra

Jumaadi al-Thani 13 is the death of Umm al-Baneen AS. She was the wife of Imam Ali AS and the mother of al-Abbas AS. Condolences.
https://www.al-islam.org/al-abbas-badr-shahin/umm-ul-banin
http://www.shiachat.com/forum/topic/37432-umm-al-baneen-sa/
http://en.wikishia.net/view/Umm_al-Banin
http://www.shiachat.com/forum/topic/235056182-umm-al-banin-mother-of-moon-of-bani-hashimsa/

Shias and Sunnis differ on the date when Lady Fatima Zahra AS was martyred and buried. The period between Jumaadi al-Awwal 13 and Jumaadi al-Thani 3 are known as the Days of Fatima AS (Ayyam-e-Fatima AS). Condolences during these days of mourning.

Jumaada al-Awwal 5 or Jumada al-Ula 5. Birth Anniversary of Sayyida Zaynab bint Ali (p). Congratulations.

Jumaada al-Awwal (also spelled Jumada al-Ula) 13 is the Martyrdom of Lady Fatima Zahra AS by the second narration. Shias and Sunnis differ on the date when Lady Fatima Zahra AS was martyred and buried. The period between Jumaadi al-Awwal 13 and Jumaadi al-Thani 3 are known as the Days of Fatima AS (Ayyam-e-Fatima AS). Condolences during these days of mourning.

To be determined by the sighting of the new crescent moon. UPDATE:
In the Name of God, the Beneficent, the Merciful
Announcement Concerning:
The Crescent Moon of the Month of Jumada al-Ula, 1444 A.H.
اضغط هنا لملاحظة بيان هلال شهر جمادى الأولى ١٤٤٤ هـ
To the respected believers in North America,
Peace be upon you.
The Moon-Sighting Committee of the Council of Shia Muslim Scholars of North America announces that Saturday, November 26th, 2022 will be the first day of the month of Jumada al-Ula, 1444 A.H. for the entire region of North America.
This determination is based on the fact that there were no verified sightings of the crescent moon by the naked eye at sunset on Thursday, November 24th, 2022 in any region of North America. Therefore, Friday, November 25th, 2022 will be the last day of Rabi al-Akhir, 1444 A.H.
We ask God, the Most High, for success in performing good deeds and to hasten the Return of Our Master, Imam Mahdi (p).
On behalf of the Crescent Committee,
Sayyid M. Rizvi, Secretary-General
https://www.imams.us/the-crescent-moon-of-the-month-of-jumada-al-ula-1444-a-h/

Rabi al-Thani 8 is the birth anniversary of the 11th Imam AS: Imam Hassan al-Askari AS. Rabi al-Thani is also known as Rabi al-Akhir. Congratulations on this happy occasion. 

Rabi al-Thani 10 is the wafat (passing away) of Sayyidah Fatima Ma’sooma AS, in Qom, Iran. She is the blessed sister of the 8th Imam Reza AS. Condolences to everyone.
Lady Fatima Masuma (a) of Qum  Get PDF
https://www.al-islam.org/lady-fatima-masuma-of-qum-masuma-jaffer

Eid al-Zahra is the Day that Imam Zaman, may Allah hasten his return, started his Imamate, after mourning the martyrdom of his father the 11th Imam AS on the previous day [Rabi al-Awwal 08].

* Safar 28 is the Death/Martyrdom of Prophet Muhammad SA and Imam Hassan AS. Condolences. May Allah (سُبْحَانَهُ وَ تَعَالَى) accept your mourning activities.
https://www.al-Islam.org/brief-history-fourteen-infallibles/first-infallible-holy-Prophet-Islam-Muhammad-ibn-Abdullah-peace
https://www.al-Islam.org/brief-history-fourteen-infallibles/fourth-infallible-second-Imam#al-Hasan-ibn-Ali-al-mujtaba-peace-be-him

* Safar 17 and Safar 30 are two dates mentioned for the Martyrdom (Shahadat) of Imam Ali ibn Musa al-Rida AS. Condolences. May your mourning for Imam Reza AS be accepted by Allah (سُبْحَانَهُ وَ تَعَالَى). If Safar is only 29 days this year, mourning for Imam Ridha AS will begin immediately after the moonsighting. 
http://www.shiachat.com/forum/topic/23745-8-imam-ridha-as-official-thread/

* Safar 20 is Arbaeen. Arbaeen-e-Shuhada-e-Karbala (عليه السلام). Arba'een is the Anniversary of the 40th day of the Martyrdom of Imam Hussain (p). Condolences to everyone. We ask Almighty God for success in performing good deeds and hasten the Return of Our Master, Imam Mahdi (p).
http://www.shiachat.com/forum/topic/234940646-arbayeen/

Condolences during the Holy Month of Muharram. 

Water is cut off from Imam Hussain, his family, and his companions, peace be upon them. 
Nafasul Mahmum, Relating to the heart rending tragedy of Karbala'  
https://www.al-islam.org/nafasul-mahmum-relating-heart-rending-tragedy-karbala-shaykh-abbas-qummi

* Muharram 9 is The Day of Tasua, the day before Ashura. Condolences. May Allah (سُبْحَانَهُ وَ تَعَالَى) accept your amal (activities) in remembrance of the martyrs of Karbala.
The Day of Tasua, The enemies have approached!
https://www.al-islam.org/habib-bin-mudhahir-kamal-al-sayyid/tasua

* Muharram 10 is The Day of ASHURA, the anniversary of the martyrdom of Imam Hussein AS and his companions. Condolences to everyone. May Allah (سُبْحَانَهُ وَ تَعَالَى) accept all your amal (activities) in remembrance of the Master of the Martyrs of Karbala. Ya Hussein AS.  
https://www.shiachat.com/forum/topic/235061246-3-imam-hussein-as-official-thread/

* Muharram 13. Burying Imam Hussain AS and his companions in Karbala. Condolences continue.....

Muharram 18 is the day the Qiblah was changed from Al Quds to the Holy Kaaba.  
https://www.al-islam.org/the-message-ayatullah-jafar-subhani/chapter-29-change-qiblah

Muharram 25 is the martyrdom (shahadat) of Imam Ali Ibn Hussain AS (Al Zain al-Abideen), popularly known as Imam Sajjad AS. Condolences to all.
https://www.al-islam.org/story-of-the-holy-kaaba-and-its-people-shabbar/fourth-imam-ali-ibn-al-husayn-zainul-abedeen

Dhul-Hijjah 10 (parts of US and Canada) is the Day of Eid al-Adha. 
https://www.al-islam.org/rites-hajj-practical-treatise-and-rules-nasir-makarim-shirazi
Please pray for the Muslims in Hajj. InShaAllah safe return and spiritual enlightenment. 
Hajj - The Islamic Pilgrimage (book):  Get PDF
https://www.al-islam.org/hajj-the-islamic-pilgrimage-sayyid-mohammed-zia-abadi
For those in the Holy City, the Hajj procedures will begin on their schedule. For those of us not going on Hajj, the reason we need to keep track of of the calendar is that they might not follow the correct moonsighting and subsequent days (such as Eid al-Ghadir and Day of Mubahila) might be celebrated on the wrong day.  
In the Name of God, the Beneficent, the Merciful
An Update Concerning:
The Crescent Moon of the Month of Dhu al-Hijjah, 1443 A.H.
Dear believers in the southern and western states of the United States of America, 
Assalamu Alaykum.
The announcement below was released last night after moonset in Southern California. Around an hour after that, news of moon-sightings by the naked eye in San Diego started to circulate causing many believers to inquire whether the beginning of the month of Dhu al-Hijjah, 1443 A.H. had changed.  
* The crescent committee of the Council of Shia Muslim Scholars of North America would like to state that for those who are content with the above-mentioned sightings and are located in the orange curve in this diagram from Charlotte (NC), going toward St. Louis (MO), Omaha (NE), to Seattle (WA), Thursday, June 30th, 2022 will be the first day of the month of Dhu al-Hijjah, 1443 A.H. 
For the rest of North America, Friday, July 1st, will be the first day of the month of Dhu al-Hijjah. 
We ask everyone who is interested in serving this monthly service for more cooperation and coordination in the future to avoid such incidents and to avoid putting the community in confusion. "... Cooperate in piety and God-wariness..." [Quran 5:2].
- The Crescent Committee
تعقيب بخصوص وضعية هلال شهر ذي الحجة الحرام
إلى سائر المؤمنين في المناطق الجنوبية والغربية في الولايات المتحدة
السلام عليكم  ورحمة الله وبركاته 
نحيطكم علماً أنّه وبعد صدور بيان لجنة الاستهلال، بنحو ساعة من غروب الشمس في جنوب كاليفورنيا انتشرت أنباء عن تحقق رؤية الهلال بالعين المجرّدة ما دعا عدداً من المؤمنين التّحري والسّؤال لمعرفة ما إذا تغير شيء.
من جهتها، تؤكد لجنة الاستهلال في مجلس العلماء بأنّ أيّ مؤمن يحصل لديه الإطمئنان بتلك الأخبار بإمكانه العمل وفقها وبالتالي سيكون الخَمِيْسُ، الوَاقِعِ فيْهِ الثَّلاثُونَ مِنْ حُزَيْرَان/جُوْن ٢٠٢٢ أوَّلَ أيامِ شَهْرِ ذِي الحِجَّةِ الحَرامِ لِعَامِ ١٤٤٣ للهِجْرَةِ لِسَائِرِ المناطِقِ الْمُمْتَدَّةِ مِنْ مَدِيْنَةِ شارْلوتْ بِولايَةِ نُوْرْثْ كارُولينا، وَمُرُوراً بمدينة ساَنْتْ لِويسْ بولاية مِيزُوري، ومدينة أُوْمَاهَا بولاية نِبْرَاسْكا، وانتهاءً بمدينة سِيَاتِل بولاية وَاشنطن، وَسَائِرِ المنَاطِقِ الَّتيْ تَحْتَها الْمُظَلَّلَةِ باِلَّلَوْنِ البُرتُقَالي في هَذَا الرَّسْمِ البَيَاني. أمّا سائر المناطق الشّمالية فكما أُعلن مسبقاً فهو الْجُمُعَة، الوَاقِعِ فِيْهِ الأوَّلَ مِنْ تَمَّوْز/جُوْلاي ٢٠٢٢ بِإذنه تَعَالَى.
نأمل من الرّاغبين بالمشاركة فيه هذه الخدمة الشهرية بذل غاية التعاون والتنسيق عملاً بقوله تعالى "وَتَعَاوَنُوا عَلَى الْبِرِّ وَالتَّقْوَىٰ" لنجنّب المجتمع المؤمن أية مؤثرات سلبية محتملة.
لجنة الاستهلال
Previous Announcement:
The Crescent Moon of the Month of Dhu al-Hijjah, 1443 A.H.
إضغط هنا لملاحظة بيان هلال شهر ذي الحجة الحرام ١٤٤٣ هـ
To the respected believers in North America,
Peace be upon you.
The Moon-Sighting Committee of the Council of Shia Muslim Scholars of North America announces that Friday, July 1st, 2022 will be the first day of the month of Dhu al-Hijjah, 1443 A.H. for the entire region of North America.
This determination is based on the fact that there were no verified sightings of the crescent moon by the naked eye at sunset on Wednesday, June 29th, 2022 in any region of North America, particularly the southern and western states. Thus, Thursday, June 30th, 2022 will be the last day of the month of Dhu al-Qidah.
We ask God, the Most High, for success in performing good deeds, the safe return of all pilgrims (hujjaj) to their towns, and to hasten the Return of Our Master, Imam Mahdi (p).
On behalf of the Crescent Committee,
Sayyid M. Rizvi, Secretary-General
https://www.imams.us/the-crescent-moon-of-the-month-of-dhu-al-hijjah-1443-a-h/

Dhul-Hijjah 8 is the eventful day that Imam Hussain AS left Mecca and began the journey to Karbala. See the map of the trip here:
https://www.al-Islam.org/articles/route-of-Imam-husayn-from-makkah-to-Karbala

Dhul-Hijjah 15 is the Birthday of the 10th Imam Ali un-Naqi al-Hadi AS. Congratulations. (Date according to a different narration.)
https://www.al-islam.org/fourteen-luminaries-islam-ahmad-ahmadi-birjandi/twelfth-infallible-hadhrat-imam-ali-al-naqi-al-hadi

Dhul-Hijjah 18 is Eid al-Ghadeer. Congratulations for the Great Eid, the day that Prophet Muhammad SA raised the hand of Imam Ali Ibn Abi Talib AS at Ghadir Khum and announced to Hajj pilgrims that Allah (سُبْحَانَهُ وَ تَعَالَى) appointed Ali Ibn Abi Talib (صلى الله عليه وآله وسلم) as the guardian (Wali), the master (Mawla), the leader (Imam), and the commander (Amir) of all believing men and women, the deputy and the executor of his affairs (Wasi), and his successor (Khalifa). SALAWAT! 
https://www.al-islam.org/ghadir/ 
Imam Jafar al-Sadiq (p) is reported to have said:
“The day of Ghadir is the best of holidays.”
[Al-Majlisi, Bihar al-Anwar, vol. 94, p. 110]
روي عن الإمام جعفر الصادق (ع):
"يومُ غَدِيرٍ أَفضَلُ الأعْيَاد"
[المجلسي، بحار الأنوار، ج ٩٤، ص ١١٠]
I.M.A.M. congratulates Imam Mahdi (p) and the Believers on
the joyous occasion of Eid al-Ghadir.

* Mubahila, Mubahala, Mubahilah, Mubahalah 
Dhul-Hijjah 24 is Eid al-Mubahalah, the meeting between Prophet Muhammad SA and the Christians of Najran. Congratulations. Links to info on this historic event and who attended:
https://www.al-islam.org/articles/event-or-eid-al-mubahalah
Get PDF

Juneteenth (a portmanteau of "June" and "nineteenth"), also known as Freedom Day, Jubilee Day, Emancipation Day or Manumission Day, is an American holiday celebrated on June 19. The Emancipation Proclamation — which had been issued on January 1, 1863 — was read to enslaved African-Americans in Galveston, Texas by Gordon Granger on June 19, 1865. Among his remarks:
"The people of Texas are informed that in accordance with a Proclamation from the Executive of the United States, all slaves are free. This involves an absolute equality of rights and rights of property between former masters and slaves, and the connection therefore existing between them becomes that between employer and free laborer."