Simplify the following text for a Grade 11 native English-speaking person.
Original: This includes holy days , such as solemnities which commemorate an event in the life of Jesus or the saints , periods of fasting such as Lent , and other pious events such as memoria or lesser festivals commemorating saints .
Simplified: Some events that are part of this calendar are the `` holy days '' , such as solemnities which honor an event in the life of Jesus or the saints , times of fasting such as Lent , and other events , such as memoria .