On Earth Day (plant trees)
She is going to plant trees
On Valentine's Day (watch a movie)
They are going to watch a movie
On her birthday (go to the beach)
she is going to go to the beach
On their anniversary (have a candle light dinner)
They are going to have a candle light dinner
On Independence Day (have a flag ceremony)
they are going to have a flag ceremony
On New Year's Eve (light a firework)
He is going to light a firework