Not wearing white after labour day is a very passé rule that has long been discarded. Despite that, many struggle with wearing white come the fall-time at the risk of breaking a fashion rule.
I, personally think white can be, and should be worn all year round. It's such a timeless, elegant neutral and can really help brighten some of falls moody tones.
If you want to learn how to wear white come the fall/winter season, click the video below.