Any food product 8 years past its expiration date should be thrown out.
about a week and a half or so
A thing, long bladed knife workd the best for cutting a cake. For best result you should cut the cake very slow so the cake is not going all over the place.
If you are talking about shelf stable canned crab meat, the date on the can is likely the 'best by' date and not an expiration. If the can is unopened, has been stored properly and is not swollen or damaged, it is likely safe to eat, but the palatability of the crab meat will deteriorate over time. The processor will not guarantee the product beyond the recommended 'use by' date.
A simple vanilla or yellow / white cake will taste the best, as it will not over-power the fun icing at all.
No.
Depends on your definition of good. It isn't harmful but the taste deteriorates over time and the manufacturer has determined you get the best flavor if it's eaten before the expiration date. If it's only a month or two past the date I'd probably try it and see how it tastes. If it's two years past, I'd pitch it.
open or unopened? if unopened it will be safe to eat long after your dead
Depending on the decorations you want on the cake the cake can cost from $250 to well over a thousand dollars. It's best to shop around and give details of what you want and find the best price you can.
Typical "best by.." date for green olives in brine in a jar is 24-30 months from packing date. Unopened, these will keep at least an additional 2 years beyond that date (in cool dark storage) and have no difference in taste. How far beyond that period is not known. Once opened, storage is seriously shortenened depending on conditions and may go down to weeks.
Turn the cake over
A lot of foods have a best by date. Usually all of the food in cans, bottles, boxes, and bags have a best by date. Food that doesn't have something protecting over it like fruit and vegetables doesn't have a best by date usually.
angel cake is over 100 years old
No. Fondant is made for a cake meant for looks. Icing is made for a regular cake.