When I'm making an arrangement to meet,I always go for "from 7 to 7.15"-type arrangements. That way,both/all can arrive without being early or late.

   if you give a time,people can technically be only early or late.

   Also,experience helps. If you know the person is always late ...............need I finish that? Yes. ..........then factor in their tendency. If they're always 30 mins late,make the arrangement 30 mins earlier, and so on.







       Ivor