My cockatiels started in May, some started molting before others. I think only two are still in the process of molting, two that started molting later than the others.
Jayde has been molting a couple of weeks after I got her in June! And still going strong! I'm wondering if she'll quit molting for winter! LOL
Charlie didn't really start molting until I think August? Still molting.
The bourke parakeet has lost a few feathers here and there but hasn't been molting like the other birds. For the most part, she's lost tail and flight feathers. Hardly any down or contour feathers.