Christmas (noun)

1. A holiday honoring the birth of Jesus Christ, observed on December 25th by most Western Christian churches.
2. A time of year when people give gifts and show affection to those they love, often in honor of the holiday.

Origin:

From middle english cristemasse, from old english cristes mæsse, from latin christi missa (christ's mass), from christus (christ) + missa (mass). first recorded in 1038.

Examples:

1. We always have a big Christmas dinner with all of our family.
2. I love giving and receiving gifts on Christmas.
3. The city was lit up with Christmas lights and decorations.
4. Everyone was in good spirits on Christmas day.
5. We sang Christmas carols as we walked around the neighborhood.