Norwaysweeden
Because the earth tilts, so in summer one pole can turn towards the sun and in winter turn away drøm the sun.
There is no answer to that. A light year is a measure of distance, not time. It is the distance light travels in one year, so it has nothing to do with dates. It is like asking what is today's date in miles.
Gd
About six months.
As of July 21, 2010, the date 25 months ago today was June 21, 2008.
Six months from October 26, 2013 will be April 26, 2014.
Three months from today's date (28 March 2013) will be 28 June 2013.
October 1
Six
14ish/2/11
November 22, 2017
From the 10th of November, 2013, when the question was asked, the date six weeks after is the 22nd of December 2013.
December 4 + 3 months = March 6.
The question was asked (making "today") 7 February 2014; 6 months later is 7 August 2014.
The date which falls six months after December 17, 2010 is June 17, 2011.
It can if it is irregular, but for many it will stay relatively the same.