I can help weaslethefirst even if i dont run this thing...
Karen
Black Heart Event - When you first begin your game, you'll need to go to the store to buy some seeds, on a Wednesday or Friday head to the store at 10:00am - 1:00pm. Keep an opened slot since she gives you a pack of Grass seeds. Just in case.
Purple Heart Event - It's during the day whenever the shop's opened in the morning. Not on Tuesdays or Wednesdays. A decision one of course.
Blue Heart Event - Well, this one occurs between 10am - 1pm on a Friday, head to the grocery store and you'll be given decisions which I'm sure you guys know what to do.
Green Heart Event - Not sure if it is right but when Karen's heart is green you go to the Inn on sunday at 7:00pm - 10:00pm to trigger this.
Yellow Heart Event - Go to the store between 10:00am to 1:00pm, possibly whenever the store is open otherwise Monday Tuesday and Sunday.(not 100% sure)
Harvest Moon Rocks!!!! I'm in my 11th year since 6-26-05! Now I am playing Harvest Moon: MORE Friends of Mineral Town! It came out on 7-27-05! If you have the girls game, ask me if you want some cheats!