After year one, there's a 1% chance of the strange capsule event being chosen. The event only does something if 50 random tiles on your farm are clear and allow item placement. The random tiles may include invalid positions (like the house or ponds), and the event won't run if even one of those tiles can't hold the item, so it's extraordinarily rare for the item to appear.
A unique <tt>UFO</tt> sound effect plays, and a Strange Capsule appears on a random tile of the farm.<ref name="strangecapsule" /> It turns into a broken Empty Capsule after about three days, which enables a [[Secrets#Strange Capsule|further Easter egg]].
{|