noun
Obon; Bon Festival
A Buddhist festival to honor ancestral spirits, typically observed in mid-August (or mid-July in some regions). Often involves visiting family graves and traditional dances.
お盆には家族みんなで墓参りに行きます。
During Obon, the whole family goes to visit the grave.
今年のお盆は8月13日から16日
This year's Obon is from August 13th to 16th.
noun
Polite form of 盆 (ぼん). Used when referring to a tray in a respectful or formal context.
See also: 盆
お盆にお茶をのせて運びました。
I carried the tea on a tray.
The prefix お (honorific) + 盆 (ぼん, 'tray' or 'Bon Festival'). The festival name derives from the Buddhist Ullambana (Sanskrit) via Chinese.