PreviousDate

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`PreviousDate`

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PreviousDate[gran]

gives the previously occurring date of the specified granularity type gran.

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PreviousDate[daytype]

gives the previous day corresponding to the specified daytype.

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PreviousDate[date,gran]

gives the previous date of the given granularity relative to the specified date.

Details and Options

PreviousDate[gran] returns a DateObject expression.
In PreviousDate[gran], the granularity type gran can be any of the following:

	"Millennium"	1000-year period beginning with year XX00
	"MillenniumBeginning01"	1000-year period beginning with year XX01
	"Century"	100-year period beginning with year XX00
	"CenturyBeginning01"	100-year period beginning with year XX01
	"Decade"	10-year period including the date
	"Year"	year including the date
	"Quarter"	3-month quarter including the date
	"Month"	month including the date
	"Week"	week beginning Monday including the date
	"WeekBeginningSunday"	week beginning Sunday including the date
	"Day"	day including the date
	"Hour"	hour including the date
	"Minute"	minute including the date
	"Second"	second including the date

In PreviousDate[daytype], the day type specification daytype can be any of the following: "Weekday", "WeekendDay", Monday through Sunday, "MonthFirstDay", "MonthLastDay" and "BusinessDay".
The following options can be given:
CalendarType Automatic calendar system for the result

TimeZone $TimeZone time zone for the result

Examples

open allclose all

Basic Examples (3)Summary of the most common use cases

Get a date object representing the previous month:

In[1]:=1

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https://wolfram.com/xid/0rszulm3o-cm55x1

Out[1]=1

Get the date object for the previous hour:

In[2]:=2

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https://wolfram.com/xid/0rszulm3o-jrt46h

Out[2]=2

Get the week before a given date:

In[1]:=1

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https://wolfram.com/xid/0rszulm3o-it397r

Out[1]=1

Find the day before the fall of Saigon:

In[2]:=2

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https://wolfram.com/xid/0rszulm3o-e7685g

Out[2]=2

Get the previous weekday:

In[1]:=1

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https://wolfram.com/xid/0rszulm3o-z1okf

Out[1]=1

Find the Sunday before the day of independence in Ghana:

In[2]:=2

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https://wolfram.com/xid/0rszulm3o-qoai7g

Out[2]=2

Scope (1)Survey of the scope of standard use cases

Date specifications may be a DateObject, DateList or DateString:

In[1]:=1

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https://wolfram.com/xid/0rszulm3o-eqbqo

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0rszulm3o-ege62p

Out[2]=2

In[3]:=3

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https://wolfram.com/xid/0rszulm3o-bueib6

Out[3]=3

Options (2)Common values & functionality for each option

CalendarType (1)

Get a granular date using the Jewish calendar:

In[1]:=1

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https://wolfram.com/xid/0rszulm3o-ocloh5

Out[1]=1

TimeZone (1)

Get a granular date with a specific time zone:

In[1]:=1

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https://wolfram.com/xid/0rszulm3o-bdq1b4

Out[1]=1

Properties & Relations (1)Properties of the function, and connections to other functions

Yesterday is equivalent to PreviousDate["Day"]:

In[1]:=1

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https://wolfram.com/xid/0rszulm3o-dhiw44

Out[1]=1

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