In France, in May, there are / is at least three bank holidays.
On/ In October 31st, there are many Halloween parties.
Next year / Last year, I will spend Christmas in the South of France.
At / On Easter Day, my family eats a lot of chocolate.
I am looking forward to see / seeing you on Valentine’s Day.
On Valentine’s Day, I will invite / invites my girlfriend to a restaurant.
In / On July, I will go to Paris to see the fireworks.
Valentine’s Day is at / on February 14th.