Saturday August 29th is Going to be Yawm Ashura InshaAllah. The prophet peace be upon him said that by fasting the day of Ashura, one would have his/her sins forgiven for the prior year. Narrated by Muslim.
It is from the Sunnah to fast two days. The day before Ashura and the day of Ashura, or the day of Ashura and the day after, or one might also fast all three days InshaAllah.
A friendly reminder, the day of Ashura is the day that Allah Subhanahu Wa Ta’ala saved Musa Peace be upon him from Pharo and drowned Phero and his people in the sea. Musa Peace be upon him fasted this day to thank Allah Subhanahu Wa Ta’ala and as such the Prophet Mohammed Peace be upon him fasted this day to thank Allah Subhanahu Wa Tal’ala and recommend that Muslims fast it as well.
May Allah accept your fasting, Ameen!