It is Monday, the tenth of Muharram; it is obligatory for the believers to spend their day in the Oneness of Allah, His remembrance, and in sending blessings upon Abu al-Khattab (peace be upon him) and his companions (peace be upon them)."

It has been narrated from another perspective that the Call (Nida’) of Abu al-Khattab Muhammad ibn Abi Zainab (peace be upon him) was on the eleventh day of Dhu al-Hijjah.

As for the Persian Festivals:

* The Day of Nowruz: It is the fourth day of April (Nisan) in every year; it possesses a great virtue and a sublime honor.

* The Day of Mehregan: It is the sixteenth day of October (Tishrin al-Awwal) in every year.

* Among the special days of joy is the ninth day of the month of Rabi’ al-Awwal in every year; it is the day of the killing of Dalam (may Allah curse him), who is 'Umar ibn al-Khattab.

We have narrated from another perspective that the twenty-first day of Dhu al-Hijjah is the Day of Mubahala, and the twenty-ninth day of Dhu al-Hijjah is the Day of the Bed (Yawm al-