Normally, flat earthers claim that the antarctic summer does not exist. Otherwise one would have to introduce really bendy light.
This might be interesting. It shows the sunrise, sunset and daylight hours at the South Pole and the North Pole for a few days either side of the equinox in March 2016.
BOTH the South Pole and the North Pole have 24 hour sun at the two Equinoxes.
(http://i1075.photobucket.com/albums/w433/RabDownunder/Equinox%202016-03%20South%20Pole_zpskuwqnexa.png)
Equinox 2016-03 South Pole
(http://i1075.photobucket.com/albums/w433/RabDownunder/Equinox%202016-03%20North%20Pole_zpsurec4zpv.png)
Equinox 2016-03 North Pole
From SunriseSunset (http://www.sunrisesunset.com/custom.asp).
Yes, for a couple of days either side of the Equinox BOTH poles get 24 hour daylight. Explain that on the Flat Earth
Of course, the handle that like all other contrary evidence - deny it!
They just deny any evidence that makes it wrong! Why? Because they are incredibly stubborn, in that they will never admit they are wrong, even though they undeniably are!
How much effort would it take on your part to stop
trying to beat us into submission?
Do you also visit quilting fora and berate them
for not buying their blankets at Walmart?
Couldn't care less about those like you, but there are some interested in finding out the massive problems with the whole idea of your "Pizza Planet"[1].
[1] Apologies to the "real Pizza Planet".