I have a google spreadsheet in which I want a date with only the name of the month and the year, like September 2011, and I also want the month and year to be easil
You can enter any format (for dates or others) as a Custom Number Format.
Highlight the cell range and Go to Format > Number > More Formats > Custom Number Format. Then enter
mmmm" "yyyy
gives "September 2011"
or any other format
ffffd" "mm"/"dd"/"yyyy
would give "Mon 09/11/2011"
note the missing quote at the beginning and the end. it shows how it will display as you experiment. Quotes in the beginning or end give you invalid format Saves you having two fields (the data, and the text() formatted one)
Its not intuitive (either the format, or where to put it). But works better than importing an xls.