PCT 2025 Change date permit

I have a PCT NOBO permit for May 20th, 2025, but I was really hoping for a late April start. Unfortunately, all the earlier dates were already taken. Does anyone know if it’s possible to change the permit date to something closer to the end of April?

I’m worried that starting later might make the hike too hot for me. My ginger skin is super sensitive to the sun! 😉 Any advice or suggestions would be greatly appreciated. Thanks!