I’ve check this problem and you have right.
The days from months are changing at next/previous but the month name are not changing.
Is a small bug. Please send us again your ftp info ( as private reply ) to fix this bug.
Thanks for your quick response.
For this time please send the part(s) of the script(s), which needs to be changed. Okay? My website is in constant work and therefore it would be bad if you do changes “on open heart”. And other users would also be interested in the solution.