* Earth's Rotation: The Earth rotates on its axis once every 24 hours. This is what causes day and night.

* Earth's Revolution: The Earth revolves around the sun once every 365.25 days. This is what defines a year.

Calculation:

1. Convert the period of revolution to days: 8766.15 hours / 24 hours/day = 365.25 days

2. The Earth rotates once per day, so in 365.25 days, it will rotate: 365.25 days * 1 rotation/day = 365.25 rotations

Therefore, the Earth rotates approximately 365.25 times during one revolution around the sun.