bug#33221: date command + 1 month

[Nicolás Flores]

Date Bug detected: Wed Oct 31 17:02:41 CST 2018
when executing
# *date +%b*
Result:
*Oct *
This is Ok, but...

# *date +%b -d '+1 month'*
Result: *Dec*
Jump in the month of *November*


@fosnss