When a+b+c = c+b+a(ruru.name)
ruru.name
When a+b+c = c+b+a
http://ruru.name/entries/when-a-plus-b-plus-c-equals-c-plus-b-plus-a/
1 comments
Or, you might have all time in UTC, and only get the local timezone involved in presentation. This would avoid the issue altogether.