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)