Here are possible messages for the search results page:

In plain text:

Found
   word search
    A The following announcements contain "foo":
    C The following conferences contain "foo":
   date search
      Past (month/year starts before today, yet could end in future)
     / A The following announcements were posted in [October] 1998:
     \ A The following announcements have been submitted for posting in [October] 1998:
       C The following conferences have been scheduled for [October] 1998:
      Future
     / A The following announcements will be posted in [November] 1998:
     \ A The following announcements are scheduled for posting in [November] 1998:
       C The following conferences are scheduled for [November] 1998:


Not found
   word search
    A Sorry, no announcements containing "foo" were found in the database.
    C Sorry, no conferences containing "foo" were found in the database.
   date search
      Past (month/year starts before today, yet could end in future)
     / A Sorry, no announcements were posted in [October] 1998.
     \ A Sorry, no announcements submitted for posting in [October] 1998 were found in the database.
       C Sorry, no conferences scheduled for [October] 1998 were found in the database.
      Future
       A Hey, we're not psychic you know.
       C Sorry, no conferences scheduled for [November] 1998 were found in the database.