No.
0.393701 inches.
do you mean hayley's comet? yes it is.
I'm assuming you mean Vernal equinox. It is on 21st March.
it is likely you mean Comida which means food
It's unclear what you mean by "hades comet." If you are referring to a comet named Hades, there is no specific comet with that name. If you meant Halley's Comet, it will next be visible from Earth in 2061.
equal day and night
What does Halley's Comet mean for the future? Nothing special; the comet will return to the inner solar system in 2061, and ought to be a pretty special view. But in the grand scheme of things, it has no special significance.
Although equinox means equal night, it doesn't mean that the day and night exactly the same. They are close. After the autumnal equinox the days are shorter though.
It mean that each year until the Equinox your birthday has to be pushed back one day..like instead of your birthday being on the 29 it gets pushed back to the 28.
The adjectives vernal and autumnal mean "of spring" and "of autumn (fall)" respectively. The equinox, when the day and night are even, occurs twice a year. Once in spring and once in autumn (fall) as we move from the extremes of the summer and winter solstices. Therefore we have a vernal equinox (in spring) and an autumnal equinox (in autumn/fall).
Time to schedule required maintenance.
seven Start of autumn and Autumnal equinox on the 22nd.