+ $params{year} = $thisyear unless defined $params{year};
+ $params{month} = $thismonth unless defined $params{month};
+
+ $params{month} = sprintf("%02d", $params{month});
+
+ if ($params{type} eq 'month' && $params{year} == $thisyear
+ && $params{month} == $thismonth) {
+ # calendar for current month, updates next midnight
+ $pagestate{$params{destpage}}{calendar}{nextchange}=($time
+ + (60 - $now[0]) # seconds
+ + (59 - $now[1]) * 60 # minutes
+ + (23 - $now[2]) * 60 * 60 # hours
+ );
+ }
+ elsif ($params{type} eq 'month' &&
+ (($params{year} == $thisyear && $params{month} > $thismonth) ||
+ $params{year} > $thisyear)) {
+ # calendar for upcoming month, updates 1st of that month
+ $pagestate{$params{destpage}}{calendar}{nextchange}=
+ timelocal(0, 0, 0, 1, $params{month}-1, $params{year});
+ }
+ elsif ($params{type} eq 'year' && $params{year} == $thisyear) {
+ # calendar for current year, updates 1st of next month
+ $pagestate{$params{destpage}}{calendar}{nextchange}=
+ timelocal(0, 0, 0, 1, $thismonth+1-1, $params{year});
+ }
+ elsif ($params{type} eq 'year' && $params{year} > $thisyear) {
+ # calendar for upcoming year, updates 1st of that year
+ $pagestate{$params{destpage}}{calendar}{nextchange}=
+ timelocal(0, 0, 0, 1, 1-1, $params{year});
+ }
+ else {
+ # calendar for past month or year, does not need
+ # to update any more
+ delete $pagestate{$params{destpage}}{calendar};
+ }