Here is the full list of all 34 Peaceful Days achievements.
Ship more than 250 of any crop.
Help mayor Robert fixing the faulty lampposts in the town.
Ship more than 250 forageable items.
Earn 10,000G.
Complete 25 requests.
Help mayor Robert fixing the broken fences in the town.
Complete 10 requests.
Ship more than 50 forageable items.
Ship more than 50 of any crop.
Earn 100,000G.
Earn 1,000,000G.
Earn 1,000,000,000G.
Complete 50 requests.
Solve the puzzle on floor 5th.
Solve the puzzle on floor 10th.
Solve the puzzle on floor 15th.
Solve the puzzle on floor 20th.
Solve the puzzle on floor 25th.
Solve the puzzle on floor 30th.
Complete 250 requests.
Ship more than 500 of any crop.
Ship more than 1000 of any crop.
Catch 5 different fish.
Catch 15 different fish.
Catch 30 different fish.
Ship more than 500 forageable items.
Ship more than 1000 forageable items.
Obtained all forageable items.
Reach 1 heart level with someone in the town.
Reach 1 heart level with 10 people in the town.
Reach 1 heart level with 20 people in the town.
Ship more than 100 eggs.
Ship more than 200 eggs...
Ship more than 200 milk bottles.