Stella May I know what is Equilux?

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Of course you may. We have already celebrated the First Day of Autumn (Autumnal Equinox), so what is the Autumnal Equilux? Equinox means "equal night," and equilux means "equal day." This year, the two days are separated by 4 days. How does that happen? The equinox is calculated when the center of the sun crosses over the horizon, while equilux is when the sun first appears over the horizon. That's why you will notice that back on Thursday, we didn't actually have 12 hours of sunlight and 12 hours of nighttime. For the day that has exactly 12 hours of each is the Equilux.

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