Mandela's death is probably the only really notable thing anyone might remember, and even then if you give it ten years, not many people will remember if it was 2012, 2013, 2014 or 2015.
I don't think 2013 really brought a great deal of memorable events apart from that. There are specific interest events but nothing that is likely to stick in society's collective mind, as it were. Most of the significant events this year are little more than repeats of other years. Is anyone going to remember Syria? Not unless they're involved. Snowdon? No. Boston Marathon bombing? In Boston. Typhoon Haiyan? If you were affected. China's moon landing? No. New Pope? No.
Not that it's a bad thing, but 2013 seems remarkably generic and dull.