Most recent kernel where this bug did not occur:
Distribution:
Hardware Environment:
Software Environment:
Problem Description:
hwclock returns an improper date reading a max6902 rtc in october 

Steps to reproduce:
In a machine with a max6902 rtc, in october, just run hwclok

Fix:
In drivers/rtc/rtc-max6902.c, function max6902_get_datetime, line 139:

dt->tm_mon      = BCD2BIN(chip->buf[5] - 1);

should be replaced for:

dt->tm_mon      = BCD2BIN(chip->buf[5]) - 1;

Explanetion: first convert to binary and then decrement.
Fortunately is only detectable in october.