"Fast Days" are specific days designated for fasting, where individuals abstain from food and sometimes drink for a set period. These days can vary by culture and religion, often serving spiritual or health-related purposes. For example, in Judaism, Yom Kippur is a significant fast day focused on atonement and reflection. In addition to religious observances, some people practice fasting for health benefits, such as weight loss or improved metabolism. Intermittent fasting, a popular trend, involves cycling between periods of eating and fasting. This approach can be adapted to fit personal schedules and health goals.