Anyone good with maths?

[flying dog]

Ok, question:

 

Sunrise and Sunset times are calculated from the Lat/Long and the date.

 

But this illusive "Start of daylight" and "End of daylight" times are difficult.

 

Indulge me:

 

(Yeah, I am probably wrong)

 

If you live on the equator, you will get 2 days a year when the sun is above you - the equinixes.

 

Between there and 23 degrees N/S you would also get 2 days a year of the same.

 

Beyond 23 degrees N/S, you yould only get one day. That would be at the solstisesessses.

 

But looking at my old SOD/EOD chart the day with the most daylight (in Sydney) is not the summer solstis.

 

Yeah, people have tried to explain it before, but I still am missing something. Maybe the desire to learn - as it has been said - or maybe just the brains to undertand it.

 

Either way, I'm still confused.

 

Could someone indulge me how this works?

 

Sore, I also appreciate if there are mountains to the east/west it would change the SOD/EOD times.

 

But for now, I'm saying it is level ground around you.

 

 

[skyfox1]

And you say your confused !!!!!!!!!!!!!!!!!!

 

 

[flying dog]

So.....

 

Wouldn't the length of twilight be related to the latitude and date?

 

Therefore, an equation would/could/should be possible

 

 

[Guest davidh10]

Hey FD. If you thought you were confused before... Here's some bed time reading.

 

I think I'll stick with using NAIPS.