The reason equilux is a few days before equinox is due to a couple of factors:
- the sun is not a point so the sunrise is measured when the top edge of it reaches above the horizon, even though it's central point is still below the horizon
- Also, the atmosphere refracts sunlight and so the sunlight bends and appears above the horizon a few minutes earlier
Am also waiting to appreciate much of the increased daylight. When we finally get a sunny day, is going to be quite a surprise. Hopefully soon, although doesn't look like it in the models. Looking forward to light evenings again though!