Excel treats time as a fraction, the portion of a day. The date is the whole
number part of a value.

Even though 1 am is two hours after 11 pm, it has a value much smaller. To
make this work you should either use a date and time, or add 1 to the times
equal to or after midnight.

- 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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"JWeitzekamp" wrote in message
...
I am trying to create an excel chart to plot times. The Y axis needs to go
from 9pm (bottom) up to 11am. The X axis should be dates. I can get this
far but the chart will not plot anytime 12am - 11am. It will only plot
9pm -
11:59pm. Does anyone know how to make this work? Thank you!