| Current day of month is one of the specified values (may contain multiple days).
| Current day of month is one of the specified values (may contain multiple days).
|-
|-
−
| <tt>x {{t|event ID}} {{t|letter ID}}</tt>
+
| <tt>x {{t|letter ID}}</tt>
−
| For the current player: mark the specified ID as seen, add the specified letter to tomorrow's mail, then return false (so the event doesn't trigger).
+
| For the current player: mark this event as seen, add the specified letter to tomorrow's mail, then return false (so that nothing further happens).