I thought it actually started in May and went through June. Am I mistaken? I do find that starting around now and through the summer Kismet's colors are more intense (she is a Cuban/caymanesis/lewisi hybrid, but she has a lot of Cuban)but I think it is more to the fact that she gets more real sunlight starting this time of year rather than related to breeding.
Kismet's idea of nest protection, btw, was to crawl in my lap to lay her last egg last time... Mommy, protect my eggs! LOL Actually, since she knew they weren't fertile, she probably didn't care....
One good thing about Kismet. If she has to lay eggs she'll just lay them whereever she happens to be. She had a nice nest box, but didn't bother with it. At least that means she doesn't try to hold them in for the right spot....