On Tue, 20 Mar 2012 19:59:28 +0100, "Gavino"
wrote:
Actually, because of atmospheric refraction, the Sun rises at the
North Pole a
few days before the equinox, and similarly sets at the South Pole a
few days
after, being fully visible at both poles on the day of the equinox.

"A few days" is here approximately 1.5 days.