According to the Panchang, Sheetla Ashtami is celebrated every year on the Ashtami Tithi of Krishna Paksha of Chaitra month, which is known as Basoda or Basoda. On this day, mainly Mother Sheetla is worshipped and stale food prepared a day before is offered to her. In such a situation, you can do these things on this day to get the blessings of Sheetla Mata. 

॥ Shri Kalika Ashtakam.

Throat bloody mustache necklace horrible noise well-toothed terrible.

Naked, in the graveyard, with her hair loose, she is agitated by the lust of the great time, Kalikeya.

He held a sword in his left arm and a sword in his right arm and fearlessness in his right arm

She had a beautiful waist with a heavy breast and a soft smile with two red blood vessels.

She wore a pair of corpse-ears, a well-haired, good ghostly hand, and used a single glass.

Ascending a corpse-shaped platform she shone with auspicious sounds in all four directions.

The three gods, beginning with Viranchi, worshiped the three modes of nature and became the chiefs of Kali.

The gods do not find Thy form, which is eternal, beginning with wine and beginning with sacrifice.

But it is the bewitching of the universe, the eloquent, the nourisher of friends, the destroyer of enemies.

Words to be stamped, what to be lifted, the gods do not find Thy form.