I came across an interesting festival celebrated in China, that acknowledges ghosts and spirits: It's called the Hungry
According to Chinatoursandfestivals.com: "With roots in Buddhism, the Hungry Ghost Festival is a time of honoring ancestors and appeasing the ’hungry’ ghosts that wander the world of the living when the ‘Gates of Hell’ are opened once a year."
The Ghost Festival, also known as the Hungry Ghost Festival in modern day, Zhong Yuan Jie or Yu Lan Jie is a traditional Buddhist and Taoist festival held in Asian countries.
It is believed that these Gates of Hell are opened once a year during the Hungry Ghost Month and all the lost and hungry ghosts of hell are free to roam the living world. To appease the lost souls and prevent them from causing harm to the living, people put food out for the ghosts. Ceremonies and rituals are also held to appease the ghosts.
According to "DiscoverHongKong.com"- one of the main highlights is the Chinese operas, usually help on temporary bamboo stages and performed to praise the charitable and pious deeds of the deities.
Activities such as swimming and travelling are avoided as it is considered dangerous in case a wayward ghost were to cause an accident. Likewise, getting married or moving house is avoided during this period as it is considered bad luck." The next festivals are Aug. 28, 2015, Aug. 17, 2016 and Sept. 4, 2017.- See more at: http://chinatoursandholidays.com/hungry-ghost-festival#stha