Traditionally, Oromos hold two seasonal Irreecha festivals:
1) one is held at the end of September (or beginning of October) at the start of the sunny season and the end of the rainy season (i.e. during the harvest season, thus it’s called ‘Thanksgiving’ festival). This seasonal Irreecha is most known to Oromos and friends of the Oromo throughout the world. This Irreecha is called Irreecha Birraa.
2) The other Irreecha festival is held on the onset of the rainy season (i.e. during the sowing season). The sowing season’s Irreecha celebration is held to pray to Waaqaa to bring about Good Spirit with rain and efforts; after all, farmers spread their seeds on the ground with the only assurance that Waaqaa is on their side to turn the seeds into bountiful crops at the end of the rainy season. This Irreecha is called Irreecha Arfaasaa.
The month of May is the height of the sowing season in Oromia, and it’s during this month that Irreecha Arfaasaa (‘Oromo Festival of Good Spirit’) is held in Oromia among the Oromo people.
On April 29, 2018, hundreds of celebrants gathered on Mount Gorota (Tulluu Goorotaa), which is located near Haramaya, Oromiyaa, to welcome the new season. Here are some pictures/videos of the event (source: Social Media).