I don't think it can be done with number formats alone. You'd have to
actually change the value in the cell so it's less than 0.5 (less than
12:00). And this may affect further calculations.

If I needed this display, I'd keep the "real" times in another column
outside of the display, and use a formula like

=IF(B3<=0.5,B3,B3-0.5)

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
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wrote in message
...
Ostensibly, I would like to use the format "h:mm", which does not
display AM or PM. But I want it to always display 12-hour time,
ignoring AM and PM, not 24-hour time.

Is there a format (standard or custom) that will do that
automagically, without my resorting to a formula?

(I am using Excel 2003.)

If I enter 10:00 in one cell and drag down, the time after 12:00 is
13:00. I want 1:00, just as I would get if I used the format "h:mm AM/
PM". (But of course, that includes the AM or PM suffix, which I do
not want.)

To get what I want, I have to manually change 13:00 to 1:00, then
start dragging down again.

That's a drag :-).