Here are some popular events and festivals that take place in Chamarel, Riviere Noire District, Mauritius by month:

January:

- Bois Cheri Marathon: An annual marathon event held in Bois Cheri, which is close to Chamarel.

February:

- Chinese New Year: Celebrated with dragon dances, fireworks, and traditional Chinese food in various parts of Mauritius, including Riviere Noire District.

- Maha Shivaratri: A Hindu festival celebrated with great devotion at sacred sites including Grand Bassin, not far from Chamarel.

March:

- Holi Festival: Also known as the Festival of Colors, this vibrant Hindu festival is celebrated by throwing colored powders and water at each other.

April:

- Easter: While not a major cultural event in Mauritius, Easter is still celebrated by both Christians and non-Christians in the country.

May:

- Labour Day: A public holiday celebrated with various events and activities throughout the island.

June:

- Cavadee: A Tamil festival celebrating the god Murugan, with devotees carrying offerings on their bodies as a form of penance.

July:

- Festival International Kreol: A celebration of Creole culture with music, dance, and traditional cuisine.

August:

- Assumption Day: A religious holiday celebrated by Catholics and other Christian denominations in Mauritius.

September:

- Ganesh Chaturthi: A Hindu festival dedicated to the elephant-headed god Ganesha, celebrated with colorful processions and rituals.

October:

- Diwali: The Festival of Lights celebrated by the Hindu community in Mauritius with colorful decorations and fireworks.

November:

- All Saints' Day: A Christian holiday when people visit cemeteries to pay their respects to deceased loved ones.

December:

- Christmas: Celebrated with decorations, carol singing, and festive meals throughout Mauritius, including Riviere Noire District.

Please note that event dates may vary each year, so it's advisable to check specific event calendars closer to your travel dates.