Microsoft Office Tutorials and References
In Depth Information
Date-Related Functions
Presidents’ Day
Presidents’ Day occurs on the third Monday in February. This formula calculates Presidents’ Day
for the year in cell A1:
=DATE(A1,2,1)+IF(2<WEEKDAY(DATE(A1,2,1)),7-WEEKDAY
(DATE(A1,2,1))+2,2-WEEKDAY(DATE(A1,2,1)))+((3-1)*7)
Easter
Calculating the date for Easter is difficult because of the complicated manner in which Easter is
determined. Easter Day is the first Sunday after the next full moon occurs after the vernal
equinox. I found these formulas to calculate Easter on the Web. I have no idea how they work. And
they don’t work if your workbook uses the 1904 date system:
=DOLLAR((“4/”&A1)/7+MOD(19*MOD(A1,19)-7,30)*14%,)*7-6
This one is slightly shorter, but equally obtuse:
=FLOOR(“5/”&DAY(MINUTE(A1/38)/2+56)&”/”&A1,7)-34
Memorial Day
The last Monday in May is Memorial Day. This formula calculates Memorial Day for the year in cell A1:
=DATE(A1,6,1)+IF(2<WEEKDAY(DATE(A1,6,1)),7-WEEKDAY
(DATE(A1,6,1))+2,2-WEEKDAY(DATE(A1,6,1)))+((1-1)*7)-7
Notice that this formula actually calculates the first Monday in June and then subtracts 7 from the
result to return the last Monday in May.
Independence Day
This holiday always falls on July 4:
=DATE(A1,7,4)
 
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