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Excel Magic Trick #173: Time Over or Under (Negative Time)
See how to show Negative time with the "Use 1904 date system". See how to create a formula that will show the time over or under a hurdle.
The IF function uses a logical test to put one of two things into a cell.
The OR function allows you to have multiple logical tests and if any one (at least one) comes out to be TRUE, then the OR function delivers a TRUE.
To add Custom Format, Ctrl + 1 (to open Format Cells Dialog Box), click on the number tab, click on Custom.
To change the settings to "Use 1904 date system": 1) Excel 2003, go to Tools menu, Options, Calculation tab, then check "Use 1904 date system"; 2) Excel 2007: Office Button, Excel Options, then click on the Advanced tab on the left, then scroll down to "When calculating this workbook", then check "Use 1904 date system".
The IF function uses a logical test to put one of two things into a cell.
The OR function allows you to have multiple logical tests and if any one (at least one) comes out to be TRUE, then the OR function delivers a TRUE.
To add Custom Format, Ctrl + 1 (to open Format Cells Dialog Box), click on the number tab, click on Custom.
To change the settings to "Use 1904 date system": 1) Excel 2003, go to Tools menu, Options, Calculation tab, then check "Use 1904 date system"; 2) Excel 2007: Office Button, Excel Options, then click on the Advanced tab on the left, then scroll down to "When calculating this workbook", then check "Use 1904 date system".