Libations of liquor are made to him in the month of Asarh.    From Wordnik.com.  [The Tribes and Castes of the Central Provinces of India Volume II] Reference

They propitiate the spirits of their ancestors on the 15th of Asarh (June) with offerings of a little rice and incense.    From Wordnik.com.  [The Tribes and Castes of the Central Provinces of India Volume II] Reference

The Jains observe fasts for the last week before the new moon in the months of Phagun (February), Asarh (June) and Kartik.    From Wordnik.com.  [The Tribes and Castes of the Central Provinces of India—Volume I (of IV)] Reference