Sadly, they have most years released the yearly outfit in august.
But most years they have had running sales from june until august, Because back then it cycled around faster.
Remember 1 year when they just changed the rotation of swim wear every two weeks.
I'm worried that they will ignore most of the swimwear that is in the wardrobe atm and only add 2-3 like they usually do now in a rotation.
Imo, They should've just had all of them available in the store from June onwards like most other games have.