What should Muslims do during the first ten days of Muharram?

Question: What should Muslims do during the first ten days of Muharram?

The Answer: During the blessed first ten days of Muharram, Muslims are encouraged to increase their acts of charity, kindness, and good deeds. One of the most virtuous practices is to observe fasting, especially on the Day of Ashurah (the 10th of Muharram). 

According to an authentic Hadith Shareef, fasting on this day carries the reward of an entire year's fasting and serves as expiation for the sins of the previous year. It is even more virtuous to fast on both the 9th and 10th of Muharram, following the Sunnah.

(Fataawa Razviyyah Shareef, Volume 24, page 493/Raza Foundation, Lahore)

And Allah Almighty Knows Best