diff options
| -rw-r--r-- | src/recur.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/recur.c b/src/recur.c index 4e8bd09..46f669d 100644 --- a/src/recur.c +++ b/src/recur.c @@ -815,6 +815,18 @@ recur_item_find_occurrence(time_t item_start, long item_dur, lt_item_day.tm_isdst = lt_day.tm_isdst; t = mktime(<_item_day); + /* + * Impossible dates must be ignored (according to RFC 5545). Changing + * only the year or the month may lead to dates like 29 February in + * non-leap years or 31 November. + */ + if (rpt_type == RECUR_MONTHLY || rpt_type == RECUR_YEARLY) { + localtime_r(&t, <_item_day); + if (lt_item_day.tm_mday != lt_item.tm_mday) + return 0; + } + + /* Exception day? */ if (LLIST_FIND_FIRST(item_exc, &t, exc_inday)) return 0; |