blind-mapmaker You have to edit a source-file for that, i use it and it works fine: https://github.com/cosmocode/dokuwiki-plugin-struct/issues/294
I modified it for my needs:
Today this Month: filter: Date ~ *-$TODAY-m-d$
This Month: filter: Date ~ *-$TODAY-m$-*
Next Month: filter: Date ~ *-$TODAYNEXT-m$-*
`
// apply inexpensive filters first
$filter = str_replace(
array(
'$ID$',
'$NS$',
'$PAGE$',
'$USER$',
'$TODAY$',
'$TODAY-m-d$',
'$TODAY-m$',
'$TODAYNEXT-m$'
),
array(
$INFO['id'],
getNS($INFO['id']),
noNS($INFO['id']),
isset($_SERVER['REMOTE_USER']) ? $_SERVER['REMOTE_USER'] : '',
date('Y-m-d'),
date('m-d'),
date('m'),
date('m',strtotime("+1 month"))
),
$filter
);
`