For those who aren't catching the "May 1 + 248 days" reference: http://arstechnica.com/information-technology/2015/05/01/boe...
The 49.7 day bug: https://support.microsoft.com/en-us/kb/216641
Apparently it's caused by uptime being stored in a 32-bit integer which simply overflows at that point in time
https://www.ibm.com/developerworks/community/blogs/anthonyv/...