How did the geography and climate of the ice ages differ from today?

First of all, climate of the ice ages was like the ice layers of Greenland and Antarctica all over (meaning freezing cold), that's one of the main differences, and it was more variable than the warm and stable climate we have these days. Besides continental sheets were expanded occupying vast more areas, and off-course less agricultural land available, so the continents shape were extremely different.

is there a year set? the question is incomplete

answer; critical thinking;