What idioms are there about "festivals"?

ring out the Old Year and ring in the New Year

Happy new year?

Ji Zhao?

Are you happy?

Enjoy a happy party.

Tuan Tuan Yuan Yuan

Decorate with lanterns and ribbons

be radiant with delight/joy

Flaming trees and silver flowers ―― the display of fireworks and the ocean of lanterns (on the night of the festival)

Say goodbye to the old and welcome the new.

Saying goodbye to the old and welcoming the new is to celebrate the New Year.

Congratulations on the new year

I respectfully congratulate you on your happiness and good luck in the new year. Common expressions of New Year greetings.

Good luck [jí x and ng gā o Zhao]

Good luck shines high.

Happily [Hu ā n ti ā n xǐ dǐ]

Describe very happy.

Get together

Get together.

Tuan Tuan yuan yuan

It is of festive and auspicious significance.

Decorate with lanterns

Hang lanterns and tie colored silk. Describe a festival or a scene with festival activities.

Bright lights

Describe light, fire will make the night bright.

be radiant with delight/joy

A cheerful expression or atmosphere.

fiery trees and silver flowers―display of fireworks and a sea of lanterns (on a festival night)

Describe the magnificent night scene decorated with lanterns or fireworks.