I wonder whether the names for months (in reserves) are translatable,

If I understand you correctly, then YES, they are translatable. The months are listed like this in opac-reserve.tmpl: <option value="2">Feb</option> The translatable string is 'Feb' (February), and the value="2" indicates the 2nd month of the year. Changing 'Feb' won't affect how the date gets stored. -- Owen