All Hindu, Christian and international festival dates for Boissy-sous-Saint-Yon, France — computed from astronomical data using Boissy-sous-Saint-Yon’s local sunrise, sunset and timezone (Europe/Paris). Each festival links to a city-precise page with significance, observance rules, and a 10-year date table.
Observed on Ashwin Shukla 1st.
Observed on Ashwin Shukla 8th.
Observed on Ashwin Shukla 9th.
Observed on Ashwin Shukla 10th.
Observed on Kartika Krishna 4th.
Halloween is observed annually on October 31.
The festival of lights — the Amavasya night when Lakshmi visits homes lit with lamps.
Observed on Kartika Shukla 6th.
Observed on Kartika Shukla 15th.
Observed on Kartika Shukla 15th.
Observed on Margashirsha Shukla 11th.
The evening before Christmas — the start of Christmas celebrations in many traditions.
The Christian celebration of the birth of Jesus Christ, observed on December 25.
The last day of the Gregorian year — celebrated worldwide with countdowns and fireworks.
The first day of the Gregorian calendar year — globally observed.
Lohri is observed annually on January 13.
Observed on the day Sun enters sidereal sign 10 of 12.
Observed on the day Sun enters sidereal sign 10 of 12.
The night when Shiva is most accessible — vigil and fast through the four prahars.
International Women's Day is observed annually on March 8.
The Sunday before Easter, marking Jesus's triumphal entry into Jerusalem.
The festival of colours, played on the day after Holika Dahan on Phalguna Purnima.
The Friday before Easter — Christian commemoration of the crucifixion of Jesus.
The Christian celebration of the resurrection of Jesus Christ.
Observed on Chaitra Shukla 1st.
Observed on the day Sun enters sidereal sign 1 of 12.
Observed on the day Sun enters sidereal sign 1 of 12.
Observed on the day Sun enters sidereal sign 1 of 12.
Observed on the day Sun enters sidereal sign 1 of 12.
Observed on the day Sun enters sidereal sign 1 of 12.
Observed on Chaitra Shukla 9th.
Observed on Chaitra Shukla 15th.
Earth Day is observed annually on April 22.