Refers to the moment or time when the sun rises above the horizon; the opposite is 日の入り, sunset.
Antonyms: 日の入り (ひのいり)
海岸で日の出を見た。
I watched the sunrise at the beach.
日の出前に山を登り始めた。
We started climbing the mountain before sunrise.
I watched the sunrise from atop the mountain.
We set off before sunrise.
The birds began to sing as the sun rose.