Festivals in Harvest Moon (GB)
There aren't very many festivals in this Harvest Moon game. Most of the time, they are referred to as breaks for this game.
The Picnic[]
This break, takes lace on Spring 27. If you accept Nina's invite, you will be taken to the picnic automatically.
The Summer Picnic[]
It can take place any time in Summer, but you must stay up late in-game. You Ann and Eve will be the only participants.
Vegetable Festival (Harvest Festival)[]
It is on Fall 10. Stay outside all day and wait to be invited. You will then go automatically.
Winter Party[]
It is on Winter 24. You must stay up all day and night until someone comes to invite you. You must be outside.