DayCount

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DayCount[date₁,date₂]

gives the number of days from date₁ to date₂.

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DayCount[date₁,date₂,daytype]

gives the number of days of the specified daytype from date₁ to date₂.

Details and Options

Dates can be specified in the following forms:

	DateObject[…]	date object
	{y,m,d}	year, month, day
	{y,m}	the first day of the specified month
	{y}	the first day of the first month of the year y
	"string"	date as a string ("Jan. 1, 2000")

Possible day types are: All (default), "Weekday", "Weekend", Monday through Sunday, "EndOfMonth", "BusinessDay", "BeginningOfMonth", and "Holiday".
DayCount excludes the beginning date of the date range.
DayCount takes the following options:

	CalendarType	"Gregorian"	calendar in which the dates have been specified
	HolidayCalendar	{"UnitedStates","Default"}	holiday schedule and subspecification for the business day and holiday computations

In the Jewish calendar, the weekdays are Sunday through Thursday.

Examples

open allclose all

Basic Examples (4)Summary of the most common use cases

Print the number of days in a date range:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-fuqw5p

Out[1]=1

Print the number of days that fall on a given day of the week:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-5g1i3

Out[1]=1

Print the number of business days in a date range:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-ffgpzo

Out[1]=1

Print all holidays in the current year, subject to the default holiday schedule:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-tgf40

Out[1]=1

Scope (2)Survey of the scope of standard use cases

Compute the average number of weekend days this century:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-cvvic7

Out[1]=1

Compute the average number of non-weekend Swedish holidays this century:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-bq5zvh

Out[1]=1

Options (3)Common values & functionality for each option

CalendarType (1)

Count all US holidays that will occur in the current Islamic calendar year:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-os64ey

Out[1]=1

HolidayCalendar (2)

Count holidays in India:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-qzthj

Out[1]=1

Different markets within a country may have different holiday schedules:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-ezamfy

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0cg4y8zwy-eilqej

Out[2]=2

In[3]:=3

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https://wolfram.com/xid/0cg4y8zwy-g0vi4g

Out[3]=3

Applications (1)Sample problems that can be solved with this function

Compute the number of days until the next US presidential election (first Tuesday after the first Monday in November of leap years):

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-ev69s

Out[1]=1

Properties & Relations (2)Properties of the function, and connections to other functions

DayCount is equivalent to the length of the list output by DayRange for the same set of inputs:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-dgoesm

Out[1]=1

Holidays, weekends, and business days always add up to the total number of days in the range:

In[1]:=1

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https://wolfram.com/xid/0cg4y8zwy-ra1fri

Out[1]=1

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