How do you activate the event with Celia in harvest moon DS?

To activate the event with Celia in "Harvest Moon DS," you need to increase your friendship level with her. Make sure to give her gifts she likes and interact with her daily. The event typically occurs after you have reached a certain friendship level, often around 3 hearts. Additionally, ensure that you have the necessary requirements met, such as having the right season or day for the event to trigger.