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  • represents a start date,
  • represents an end date, and
  • is the type of day count basis to use.
    • DAYSBETWEENBASIS() calculates the number of days between start date and end date with respect to the count basis factor.



  • DAYSBETWEENBASIS() returns the number of days from specified start date to end date.
  • and dates should be entered either in 'date format' or 'dates returned using formulas'. If dates are not valid, Calci displays #N/A error message.
  • date should be < , else Calci displays NaN error message.
  • value is optional. If omitted, Calci assumes it to be 0.
  • We can use the DD/MM/YYYY format also. For Example:"14/5/2005[DD/MM/YYYY]".

Below table shows the use of values:

Basis Description
0 US (NASD) 30/360
1 Actual/actual
2 Actual/360
3 Actual/365
4 European 30/360
  • If value is other than 0 to 4, Calci displays #N/A error message.
  • We can use Range values also. For Example: DAYSBETWEENBASIS(#1/1/2014-2/1/2014,"4/1/2014").
  • #date notation needs mm/dd/yy format .


DAYSBETWEENBASIS (From,To,Basis) function with inputs in order is calculated as follows:

=DAYSBETWEENBASIS(A1,A2,A3) : Calculates the days between the dates mentioned with the inputs 
in the range A1 to A3 with basis count factor '4'. Returns 276 as a result. =DAYSBETWEENBASIS(DATE(2014,1,1),DATE(2014,4,1)) : Calculates the days between the dates mentioned.
Returns 90 as a result. =DAYSBETWEENBASIS(DATE(2014,1,1),DATE(2015,4,1)) : Calculates the days between the dates mentioned.
Returns 450 as a result. =DAYSBETWEENBASIS("17/6/2004[DD/MM/YYYY]","21/5/2006[DD/MM/YYYY]")= 694

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