## Excel Formula: Count Day of Week between two dates

This tutorial provides the formula to count a specific weekday between two given dates in Excel.

Generic formula:

 SUMPRODUCT(--(WEEKDAY(ROW(INDIRECT(start_date&":"&end_date)))=week_day))

Syntaxt and Arguments

 Start_date, end_date: the two dates that you want to count a specific weekday between. Week_day: a number that indicates the weekday that you want to count the number between two dates.

Week_day number

 Weekday Number Sunday 1 Monday 2 Tuesday 3 Wednesday 4 Thursday 5 Friday 6 Saturday 7

Return Value

The formula returns to a numeric value.

How this formula works

In cell B3 and C3 are the two dates you want to count the specific weekday between, and in the E3 is the weekday number, please use formula as this:

 =SUMPRODUCT(--(WEEKDAY(ROW(INDIRECT(B3&":"&C3)))=E3))

Press Enter key to get the result, then if you need, drag the auto fill handle to apply the formula to other cells.

Explanation

INDIRECT function: returns a valid worksheet reference.

ROW function: returns row number of the reference.

The formula ROW(INDIRECT(B3&":"&C3)), returns an array result as this:
{43933;43934;43935;43936;43937;43938;43939;43940;43941;43942;43943;43944}

Since B3:C3 can be seen as the date range 43933:43944 (the dates are stored as numbers in Excel).

WEEKDAY function: gets the day of week (1-7) from a given date.

The formula WEEKDAY(ROW(INDIRECT(B3&":"&C3)) returns an array result as this:
{1;2;3;4;5;6;7;1;2;3;4;5}

SUMPRODUCT function: returns the result of multiplied and summed arrays.

Now the formula calculates as below:

=SUMPRODUCT(--(WEEKDAY(ROW(INDIRECT(B3&":"&C3)))=E3))
=SUMPRODUCT(--({1;2;3;4;5;6;7;1;2;3;4;5}=E3))
=SUMPRODUCT(--{FALSE;FALSE;FALSE;FALSE;FALSE;TRUE;FALSE;FALSE;FALSE;FALSE;FALSE;FALSE})
=1

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