To Mahayana Buddhists, the seventh lunar month is a month of joy. This is because the fifteenth day of the seventh month is often known as the Buddha's joyful day and the day of rejoice for monks. The origins of the Buddha's joyful day can be found in various scriptures. When the Buddha was alive, his disciples meditated in the forests of India during the rainy season of summer. Three months later, on the fifteen day of the seventh month, they would emerge from the forests to celebrate the completion of their meditation and report their progress to the Buddha. In the Ullambana Sutra, the Buddha instructs his disciple Maudgalyāyana on how to obtain liberation for his mother, who had been reborn into a lower realm, by making food offerings to the sangha on the fifteenth day of the seventh month. Because the number of monks who attained enlightenment during that period was high, the Buddha was very pleased.