- For other uses, see Sunny Day.
There was not much of a strategy different than the general strategy for a level. You would have simply planted a Sunflower, wait for the recharge to pass (and collect sun in the process), planted another one, and then planted a third Sunflower or defeat the first zombie. After that, completing the level in any way should have achieved Sunny Day. The total amount of sun needed to plant three Sunflowers is 150.