string->time bug added by sethalves on Fri May 24 18:05:20 2013

#;8> (time->string (string->time "5/18" "%m/%y"))
"Sun May 20 00:00:00 2018"
#;9> (time->string (string->time "5/20" "%m/%d"))
"Sun May 20 00:00:00 2018"