Aashura is the 10th day of Muharram. And it is advised by the Prophet (ﷺ) to at least fast for two days in these months. It is mentioned that the Prophet (ﷺ) came to Madinah and saw the Jews fasting on the day of Aashura. And asked them about that. They replied, “This is a good day, the day on which Allah reduced Bani Israel from their enemy. So Moses fasted this day,” the Prophet (ﷺ) said, “We have more claim over Moses than you” So, the Prophet fasted on that day and told the people to fast.
It is also recommended to fast another day with the 10th, to show our closeness to Musa (AS) is greater than others (so either 9th and 10th or 10th and 11th) as the Prophet fasted on the 10th of Muharram, and intended to fast the 9th the following year but passed away.
We can use the month as a way to find out how we can earn the most reward by trying different deeds and incorporating them into our daily lives, and then using it to help us make the most out of this year.