Hi to all
I have a spreadsheet with data imported from an external source that
contains five date fields. In one of these the dates look OK but the field
has a general format diplayed as a date, and can be used to perform date
arithmetic. However if I try and perform a numeric custom filter the data is
not recognised. I can correct this by performing a Data / Text to Columns and
selecting a date format, but can anybody explain to me how this anomoly can
be?

Thanks.