Can I burn paper at the grave on the fifteenth day of the lunar calendar?

Of course. Buddhism emphasizes that the reason why we burn incense on the fifteenth day of the first lunar month is because we can support Buddha, Bodhisattva and six sentient beings at the same time. Among them, there is a kind of ghost beings who specialize in eating incense, but their time and space flow is slower than ours. A ghost day is equivalent to a month on earth, so we burn incense on the fifteenth day of the first lunar month to support their lunch and dinner, so the merits of burning incense in these two days are particularly great, which forms the fifteenth lunar month. In fact, only the Buddha in your heart can burn incense anytime and anywhere.

It smells so good, not to mention the money for burning paper.