Comment 1 for bug 1437534

I had the I think the same problem with mktime().
(Ubuntu EGLIBC 2.19-0ubuntu6.8) 2.19

With input data:
struct tm testtime = {0};
    testtime.tm_year=10;
    testtime.tm_mon=0;
    testtime.tm_mday=1;
    testtime.tm_hour=0;
    testtime.tm_min=0;
    testtime.tm_sec=0;

mktime(t) int -1893459600 for "Europe/Budapest"
mktime(t) int -1893456000 for "Europe/London"
mktime(t) int -1893462264 ??? for "Europe/Bucharest"

for
struct tm testtime = {0};
    testtime.tm_year=50;
    testtime.tm_mon=0;
    testtime.tm_mday=1;
    testtime.tm_hour=0;
    testtime.tm_min=0;
    testtime.tm_sec=0;

mktime(t) int -631155600 for "Europe/Budapest"
mktime(t) int -631152000 for "Europe/London"
mktime(t) int -631159200 for "Europe/Bucharest"
mktime(t) int -631134000 for "America/Nipigon"