Onam, Thiruvonam is of spring festival,Hindu type . Because of Harvest festival,Marks the end of Ramadan fasting,Birth Anniversary of Mahaveer Swami the festival Onam, Thiruvonam is observed . Onam, Thiruvonam 2019 date was Fri 13 Sep,April 28 (Eastern) . 25 Kislev is when the festival begins . The frequency of this festival is Biannual . Onam, Thiruvonam is related to Koshōgatsu (in Japan) . At the last night of the month of Ramadan is when this festival ends  . Bhogi is also called Onam, Thiruvonam . Onam, Thiruvonam 2021 date was Saturday 20 March 2021,at 09:37 UTC * . The festival is observed by Kerala state,Jordan . the Jain Temple are the celebrations of this festival . Variable (follows the Islamic lunar calendar) is when Onam, Thiruvonam is celebrated . The 2018 date of the festival was Fri 24 Aug,February 28 . Sadya,and Vallamkali,Onavillu,Athachamayam,Thiruvathira Kali,Puli Kali,Pookalam,Kazhchakkula rituals are observed in this festival . The common name of the festival Hebrew: תַּעֲנִית אֶסְתֵּר is Onam, Thiruvonam . The 2020 date of the festival was 24 May (expected – may differ 1 day dependent on sighting of lunar crescent)
There is at least one more name of Vesak festival